May Shein, M.D.
NPI 1255565008 · Family Medicine Physician · Fremont, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
May Shein, M.D. is a Family Medicine Physician provider in Fremont, CA (NPI 1255565008).
Provider details
- NPI number
- 1255565008
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A109552 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 147 | 63 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 109 | 14 |
| Amlodipine Besylate | 103 | 42 |
| Metformin Hcl | 76 | 29 |
| Losartan Potassium | 73 | 31 |
| Gabapentin | 59 | 22 |
| Hydrochlorothiazide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-05-07
- Last updated
- 2014-05-15
Frequently asked questions
- What is May Shein's NPI number?
- May Shein's National Provider Identifier (NPI) is 1255565008, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is May Shein's specialty?
- May Shein is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is May Shein located?
- May Shein's practice location on file with NPPES is 39500 Liberty St, Fremont, CA 94538-2211.
- What is May Shein's phone number?
- The practice phone number listed in the NPPES registry for May Shein is (510) 770-8040.
- Does May Shein accept Medicare?
- May Shein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is May Shein's NPI active?
- Yes — May Shein's NPI (1255565008) is active in the NPPES registry as of the last update on 2014-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.