Htay Win, M.D.
NPI 1881642155 · Internal Medicine Physician · Fremont, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Htay Win, M.D. is a Internal Medicine Physician provider in Fremont, CA (NPI 1881642155).
Provider details
- NPI number
- 1881642155
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A88638 (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
20 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
7,983 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 2,129 | $143 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,413 | $122 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 1,134 | $115 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 664 | $80 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 414 | $85 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 246 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,116 | 254 |
| Furosemide | 874 | 172 |
| Amlodipine Besylate | 825 | 205 |
| Levothyroxine Sodium | 810 | 127 |
| Losartan Potassium | 698 | 178 |
| Metformin Hcl | 617 | 161 |
| Gabapentin | 517 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$734 across 32 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
- 2006-05-05
- Last updated
- 2017-12-11
Frequently asked questions
- What is Htay Win's NPI number?
- Htay Win's National Provider Identifier (NPI) is 1881642155, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Htay Win's specialty?
- Htay Win is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Htay Win located?
- Htay Win's practice location on file with NPPES is 3458 Mowry Ave, Fremont, CA 94538-1422.
- What is Htay Win's phone number?
- The practice phone number listed in the NPPES registry for Htay Win is (510) 793-1958.
- Does Htay Win accept Medicare?
- Htay Win is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Htay Win's NPI active?
- Yes — Htay Win's NPI (1881642155) is active in the NPPES registry as of the last update on 2017-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.