Ann Mai, MD
NPI 1215001904 · Internal Medicine Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Mai, MD is a Internal Medicine Physician provider in Irvine, CA (NPI 1215001904).
Provider details
- NPI number
- 1215001904
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A61491 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
121 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 50 | $99 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 48 | $138 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 23 | $140 |
Typical Medicare-allowed amounts for these services range $99–$140 (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 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 116 | 33 |
| Losartan Potassium | 68 | 15 |
| Levothyroxine Sodium | 56 | 16 |
| Rosuvastatin Calcium | 48 | 13 |
| Alprazolam | 42 | 11 |
| Amlodipine Besylate | 41 | 11 |
| Simvastatin |
Practice location
Mailing address
Additional practice locations (1)
- 20072 Sw Birch St Ste 110Newport Beach, CA 92660-1505Phone: (949) 660-9972
Registry dates
- Enumerated
- 2006-11-17
- Last updated
- 2024-08-20
- Certified
- 2024-08-20
Frequently asked questions
- What is Ann Mai's NPI number?
- Ann Mai's National Provider Identifier (NPI) is 1215001904, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Mai's specialty?
- Ann Mai is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ann Mai located?
- Ann Mai's practice location on file with NPPES is 4950 Barranca Pkwy Ste 207, Irvine, CA 92604-8648.
- What is Ann Mai's phone number?
- The practice phone number listed in the NPPES registry for Ann Mai is (949) 262-9700.
- Does Ann Mai accept Medicare?
- Ann Mai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Mai's NPI active?
- Yes — Ann Mai's NPI (1215001904) is active in the NPPES registry as of the last update on 2024-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.