Kelvin Kay, M.D.
NPI 1588778542 · Internal Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kelvin Kay, M.D. is a Internal Medicine Physician provider in Vallejo, CA (NPI 1588778542).
Provider details
- NPI number
- 1588778542
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD25898 (OR)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
74 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 52 | $82 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $138 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 11 | $83 |
Typical Medicare-allowed amounts for these services range $82–$138 (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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cefpodoxime Proxetil | 23 | 23 |
| Atorvastatin Calcium | 16 | — |
| Furosemide | 16 | 13 |
| Ciprofloxacin Hcl | 13 | 13 |
| Prednisone | 13 | 13 |
| Losartan Potassium | 12 | — |
| Dabigatran Etexilate Mesylatebrand: Pradaxa | 12 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-18
- Last updated
- 2021-12-08
Frequently asked questions
- What is Kelvin Kay's NPI number?
- Kelvin Kay's National Provider Identifier (NPI) is 1588778542, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kelvin Kay's specialty?
- Kelvin Kay is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kelvin Kay located?
- Kelvin Kay's practice location on file with NPPES is 975 Sereno Dr, Vallejo, CA 94589-2441.
- What is Kelvin Kay's phone number?
- The practice phone number listed in the NPPES registry for Kelvin Kay is (925) 876-3882.
- Does Kelvin Kay accept Medicare?
- Kelvin Kay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kelvin Kay's NPI active?
- Yes — Kelvin Kay's NPI (1588778542) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.