Providers
All 12 in CA
ALYSSA MILLIRON, MD
NPI 1033640099, individual, Chico, CA, Internal Medicine
4
Evidence tier
structure or single-organization volume
- Hours beyond a day in 1 month, but with up to 900 patients a month across 3 billing organizations, which points to a supervising clinician on the claims rather than one person's hours.
- Records needed.
score 49 of 100, rank 9761, $4K 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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug 2024 | More hours than a day holds, even counting one unit per claim line | 25.5 | 3.3 | 2.2 | 3.1 | 900 | 2 | 99203 99212 99213 99214 | $4K |
National provider registry
From the CMS NPPES Registry, refreshed daily.
| Name | ALYSSA MILLIRON, MD |
| Type | Individual, sole proprietor |
| Status | Active |
| NPI issued | March 22, 2017, last updated May 22, 2020 |
| Practice location | 680 COHASSET RD, Chico, CA 95926-2213, 530-342-4395 |
| Specialties | Internal Medicine (207R00000X, primary, license A157920 CA) |
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 | |
|---|---|---|---|---|---|---|---|
| T1015 | Medicaid service code | $4.0M | 94% | $208 | $182 (top 5% from $488) | 61st percentile | |
| 99213 | Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | $113K | 3% | $8.03 | $44 (top 5% from $110) | 10th percentile | |
| 99214 | Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | $56K | 1% | $9.92 | $60 (top 5% from $133) | 7th percentile | |
| 90651 | Medicaid service code | $25K | 1% | $133 | $1.93 (top 5% from $51) | 98th percentile | |
| 80305 | Testing for presence of drug, read by direct observation | $20K | 0% | $7.90 | $9.23 (top 5% from $22) | 41st percentile | |
| 90677 | Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | $15K | 0% | $118 | $1.76 (top 5% from $108) | 96th percentile | |
| 99212 | Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | $14K | 0% | $7.24 | $28 (top 5% from $147) | 21st percentile | |
| 99203 | New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | $7K | 0% | $17 | $67 (top 5% from $121) | 7th percentile |
Medicare Part B 2024, largest codes
| code | what it is | services | beneficiaries | paid | submitted per service | allowed per service | charge to allowed | usual for this code |
|---|---|---|---|---|---|---|---|---|
| 81002 | Urinalysis, manual test | 71 | 67 | $242 | $20 | $3 | 5.9x | 3.5x (90th percentile 7.6x) |
| 87880 | Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | 14 | 14 | $227 | $35 | $16 | 2.2x | 2.6x (90th percentile 4.1x) |
| 82962 | Blood glucose (sugar) test performed by hand-held instrument | 13 | 13 | $42 | $15 | $3 | 4.7x | 3.7x (90th percentile 8.1x) |
| 83037 | Hemoglobin a1c level, by device for home use | 116 | 91 | $1 | $0 | $0 | 1.0x | 3.2x (90th percentile 6.3x) |
A submitted charge many times the allowed amount is common and lawful; it matters when it is far above what other providers submit for the same code.
In this area
12 providers in Butte County, CA carry an indicator in the public record, with $22.1M at stake between them. The most common is more hours than a day holds, on 11 of them, followed by part of a provider network on 1.
| tier | provider | at stake | why |
|---|---|---|---|
| 3 | FEATHER RIVER CARE CENTER LLC Oroville, CA, ranked 7041 | $0 |
|
| 4 | CHESTER AUSTIN Chico, CA, ranked 7637 | $2.4M |
|
| 4 | CHUKWUEMEKA NDULUE Gridley, CA, ranked 7639 | $2.3M |
|
| 4 | HEATHER O'CONNELL Chico, CA, ranked 7810 | $1.1M |
|
| 4 | JOE TAYLOR Chico, CA, ranked 8117 | $2.7M |
|
| 4 | MARJORIE SHELTON-GROSS Chico, CA, ranked 8402 | $5.2M |
|
| 4 | MARK HEINRICH Oroville, CA, ranked 8432 | $4.5M |
|
| 4 | NARINDER SINGH Oroville, CA, ranked 8846 | $1.4M |
|
Recent enforcement in CA
All releasesDepartment of Justice and HHS-OIG releases for this state, newest first. Each opens in a new tab.
DOJPleaded guiltyAug 27, 2026
Anaheim Woman Pleads Guilty to Submitting More Than $2.2 Million in Fraudulent Hospice Care Claims to Medicare
Galbraith submitted approximately $2,266,694 in claims to Medicare for hospice services for beneficiaries who did not have a terminal illness with a life expectancy of six months or less, and Medicare paid her company approximately $2,140,606.
DOJCivil settlementAug 26, 2026
DermTech Inc. to Pay Up to $5M to Resolve Allegations It Submitted False Claims to Medicare for Unreliable Skin Cancer Tests
DermTech Inc. submitted claims to Medicare for skin cancer tests conducted with an unvalidated positive control range and for tests lacking sufficient patient RNA, and did not retract results or adequately refund Medicare.
DOJCivil settlementAug 26, 2026
DermTech Inc. to Pay Up to $5M to Resolve Allegations It Submitted False Claims to Medicare for Unreliable Skin Cancer Tests
DermTech Inc. billed Medicare for skin cancer tests conducted using an unvalidated positive control range and for tests with insufficient patient RNA, and did not retract the results or adequately refund Medicare.
DOJCivil settlementAug 24, 2026
Medicare Advantage Provider Monogram Health Agrees to Pay $2.4 Million to Settle False Claims Act Lawsuit
Monogram knowingly submitted diagnosis codes in four HCCs that were not clinically accurate, not supported by medical record documentation, and/or did not require or affect patient care, inflating Medicare Advantage beneficiaries' risk scores and causing CMS to make higher capitated payments to Medicare Advantage Organizations.
DOJCivil settlementAug 24, 2026
Medicare Advantage Provider Monogram Health Agrees to Pay $2.4M to Settle False Claims Act Suit
Monogram Health knowingly submitted diagnosis codes within four HCCs that were not clinically accurate, not supported by medical record documentation, and/or did not require or affect patient care, inflating Medicare Advantage beneficiaries' risk scores and causing CMS to make higher capitated payments to MAOs.
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.