Vasanthi Narayan, M.D.
NPI 1598939589 · Endocrinology, Diabetes & Metabolism Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vasanthi Narayan, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Irvine, CA (NPI 1598939589).
Provider details
- NPI number
- 1598939589
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 93293 (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
18 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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 333 | 113 |
| Alendronate Sodium | 113 | 37 |
| Teriparatidebrand: Forteo | 99 | 20 |
| Methimazole | 86 | 30 |
| Raloxifene Hcl | 75 | 26 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 54 | 30 |
| Empagliflozinbrand: Jardiance | 42 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-21
- Last updated
- 2021-11-22
Frequently asked questions
- What is Vasanthi Narayan's NPI number?
- Vasanthi Narayan's National Provider Identifier (NPI) is 1598939589, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vasanthi Narayan's specialty?
- Vasanthi Narayan is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Vasanthi Narayan located?
- Vasanthi Narayan's practice location on file with NPPES is 6670 Alton Pkwy, Irvine, CA 92618-3734.
- What is Vasanthi Narayan's phone number?
- The practice phone number listed in the NPPES registry for Vasanthi Narayan is (888) 988-2800.
- Does Vasanthi Narayan accept Medicare?
- Vasanthi Narayan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vasanthi Narayan's NPI active?
- Yes — Vasanthi Narayan's NPI (1598939589) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.