JOHN M WALKER, D.O.

NPI 1356731731, individual, Tulsa, OK, Pediatrics

Evidence tier

structure or single-organization volume

Hours beyond a day in 1 month, but with up to 919 patients a month, which points to a supervising clinician on the claims rather than one person's hours.
Records needed.
Medicaid dollars per patient on code 99204 ($273 per patient-month) sit in the top 5% of every provider billing that code.

score 56 of 100, rank 7485, $4.2M at stake

Hours billed per day

Medicaid billing converted into hours of hands-on care per day. The lower bound counts one unit per claim line and needs no price; the other two divide dollars by a unit price, the conservative one at 1.5 times the price. The clinician on the claim may be a supervisor under state rules, so billing organizations are counted too.

month	what was found	hours per day, lower bound	hours per day, at price	hours per day, conservative	per working day	patients	billing organizations	codes	paid
Nov 2021	More hours than a day holds at a conservative unit price	16.3	36.8	24.5	33.5	919	1	99203 99204 99213 99214	$201K

National provider registry

From the CMS NPPES Registry, refreshed daily.

Name	JOHN M WALKER, D.O.
Type	Individual, sole proprietor
Status	Active
NPI issued	January 23, 2015, last updated January 13, 2020
Practice location	717 S HOUSTON AVE, SUITE 400, Tulsa, OK 74127-9023, 845-234-8420
Specialties	Student in an Organized Health Care Education/Training Program (390200000X) Pediatrics (208000000X, primary, license 6272 OK)

Procedures billed

The specific codes behind the dollars. Medicaid figures come from T-MSIS (2018 to 2024) and are compared with every other provider billing the same code; Medicare figures come from the 2024 physician and supplier file and compare this provider's submitted charge with what Medicare allowed, against the usual ratio for that code.

Medicaid, largest codes

code	what it is	paid	share	per patient-month	typical	rank among providers
99214	Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	$4.1M	53%	$205	$60 (top 5% from $133)	99th percentile
99204	New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	$1.5M	19%	$273	$95 (top 5% from $171)	100th percentile
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	$864K	11%	$142	$44 (top 5% from $110)	97th percentile
87426	Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus	$485K	6%	$41	$32 (top 5% from $49)	78th percentile
99203	New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	$467K	6%	$179	$67 (top 5% from $121)	99th percentile
87804	Detection test by immunoassay with direct visual observation for influenza virus	$147K	2%	$29	$22 (top 5% from $33)	85th percentile
87880	Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)	$104K	1%	$15	$12 (top 5% from $18)	77th percentile
87807	Detection test by immunoassay with direct visual observation for respiratory syncytial virus	$30K	0%	$12	$11 (top 5% from $17)	60th percentile

In this area

118 providers in OK carry an indicator in the public record, with $43.2M at stake between them. The most common is part of a provider network, on 62 of them, followed by more hours than a day holds on 41. 10 are tier 1: documented action, then payment.

tier	provider	at stake	why
1	LADD ATKINS Tulsa, OK, ranked 27	$10K	Listed on the Medicare revocation list since October 30, 2023. Medicaid still paid claims in 2 later months, $10,085 in total. and 2 more
1	ADVANCED BEHAVIORAL SOLUTIONS, LLC Oklahoma City, OK, ranked 123	$144K	Adjudicated (sentenced) per a state attorney general release dated June 9, 2026. Medicaid paid $144,136 in the last 12 observed months.
1	KARUNESH SINGHAL Edmond, OK, ranked 208	$37K	Listed on the Medicare revocation list since September 26, 2020. Medicaid still paid claims in 3 later months, $36,675 in total.
1	MMS IMAGING SERVICES LLC Oklahoma City, OK, ranked 241	$21K	Listed on the Medicare revocation list since February 11, 2021. Medicaid still paid claims in 6 later months, $20,766 in total.
1	DANIEL GARRISON Lawton, OK, ranked 260	$15K	Listed on the Medicare revocation list since February 2, 2023. Medicaid still paid claims in 1 later month, $14,834 in total.
1	FRANKLIN NWOKE Oklahoma City, OK, ranked 315	$6K	Listed on the IN Medicaid exclusion list and the MD Medicaid exclusion list since May 9, 2019. Medicaid still paid claims in 26 later months, $5,888 in total.
1	BACK PAIN HOME SUPPLIES LLC Drumright, OK, ranked 511	$0	Adjudicated (indicted, convicted) per a Department of Justice release dated January 8, 2026. No Medicaid payments in the last 12 observed months.
1	NATASHA ALLMON Oklahoma City, OK, ranked 535	$0	Adjudicated (pleaded guilty, sentenced) per a Department of Justice release dated August 15, 2025. No Medicaid payments in the last 12 observed months.

All 118 in OK

Recent enforcement in OK

All releases

Department of Justice and HHS-OIG releases for this state, newest first. Each opens in a new tab.

DOJIndictedJun 24, 2026

NDOK Announces Charges Related to the 2026 National Health Care Fraud Takedown

Bowles, operator of three pharmacies, allegedly submitted false claims for reimbursement for COVID-19 tests to Medicare and Medicaid, and a civil forfeiture complaint alleged Dameion Ray improperly used approximately $300,000 of a $600,000 Child Care Desert Grant to purchase real property.

DOJIndictedJun 23, 2026

Western District of Oklahoma Cases Filed as Part of National Health Care Fraud Takedown

Two defendants operating a durable medical equipment company were indicted for submitting fraudulent TRICARE claims for more than 650,000 in-person CPAP-related services they did not provide, and a speech-language pathologist was charged in a civil complaint with submitting more than $2.5 million in false claims to Medicare, Oklahoma Medicaid, and TRICARE for services not rendered or not medically necessary.

DOJSentencedMay 1, 2026

Oklahoma City Woman Sentenced to Federal Prison for $1.1 Million Health Care Fraud Scheme

Allmon submitted thousands of false and fraudulent claims to Blue Cross Blue Shield for behavioral health counseling sessions purportedly provided to family members, including claims of treating beneficiaries for more than 24 hours in a single day.

DOJCivil settlementJan 22, 2026

Traditions Health Agrees to Pay $34M to Resolve False Claims Act Liability Relating to Home Health Services Following Self Disclosure

Traditions submitted claims to Medicare for home health services that were not medically necessary from its McAlester, Oklahoma location and paid remuneration to physician-medical directors in Oklahoma and Texas who referred Medicare beneficiaries to it for home health services.

DOJSentencedOct 14, 2025

Compounding Pharmacy Owner Sent Back to Prison

Compounding pharmacy owner previously convicted of conspiracy to offer and pay health care kickbacks was sentenced for violating supervised release by failing to make restitution payments and concealing accounts, businesses, and asset transfers from Probation.

Referral packet

The packet is a draft for a reviewer. It reads every public record behind this case, states what the records show with a citation for each finding, names the regulation each finding relates to, and lists the ordinary explanations to rule out first. It never asserts intent.

Ask this case

Answers come only from the evidence tables, and every sentence cites the record it used.