Alyssa Milliron, MD
NPI 1033640099 · Internal Medicine Physician · Chico, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alyssa Milliron, MD is a Internal Medicine Physician provider in Chico, CA (NPI 1033640099).
Provider details
- NPI number
- 1033640099
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A157920 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
214 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Hemoglobin A1c Level, By Device for Home Use83037 | 116 | $0 |
| Urinalysis, Manual Test81002 | 71 | $3 |
| Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)87880 | 14 | $16 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 13 | $3 |
Typical Medicare-allowed amounts for these services range $0–$16 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 92 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 170 | 53 |
| Gabapentin | 142 | 30 |
| Levothyroxine Sodium | 113 | 32 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 111 | 19 |
| Omeprazole | 93 | 23 |
| Tamsulosin Hcl | 85 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,453 across 78 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-03-22
- Last updated
- 2020-05-22
- Certified
- 2020-05-22
Frequently asked questions
- What is Alyssa Milliron's NPI number?
- Alyssa Milliron's National Provider Identifier (NPI) is 1033640099, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyssa Milliron's specialty?
- Alyssa Milliron is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alyssa Milliron located?
- Alyssa Milliron's practice location on file with NPPES is 680 Cohasset Rd, Chico, CA 95926-2213.
- What is Alyssa Milliron's phone number?
- The practice phone number listed in the NPPES registry for Alyssa Milliron is (530) 342-4395.
- Does Alyssa Milliron accept Medicare?
- Alyssa Milliron is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alyssa Milliron's NPI active?
- Yes — Alyssa Milliron's NPI (1033640099) is active in the NPPES registry as of the last update on 2020-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.