Calvin Day, M.D.
NPI 1831379692 · MOHS-Micrographic Surgery Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Calvin Day, M.D. is a MOHS-Micrographic Surgery Physician provider in San Antonio, TX (NPI 1831379692).
Provider details
- NPI number
- 1831379692
- Entity type
- Individual
- Primary specialty
- MOHS-Micrographic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G1883 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
3,279 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,178 | $6 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 628 | $86 |
| Destruction of Skin Growth, 1-14 Growths17110 | 348 | $100 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 293 | $38 |
| Removal and Microscopic Exam of Growth of Head, Neck, Hands, Feet, Or Genitals, 1-5 Tissue Blocks17311 | 147 | $543 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Imiquimod | 174 | 73 |
| Gentamicin Sulfate | 134 | 111 |
| Cephalexin | 78 | 72 |
| Terbinafine Hcl | 78 | 23 |
| Doxycycline Hyclate | 71 | 20 |
| Clobetasol Propionate | 66 | 38 |
| Betamethasone Dipropionate | 53 | 35 |
| Betamethasone/Propylene Glycbrand: Betamethasone Diprop Augmented |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$95 across 1 record (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
- 2007-11-09
- Last updated
- 2023-08-25
- Certified
- 2023-08-25
Frequently asked questions
- What is Calvin Day's NPI number?
- Calvin Day's National Provider Identifier (NPI) is 1831379692, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Calvin Day's specialty?
- Calvin Day is listed in the NPPES registry with a primary specialty of MOHS-Micrographic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin Day located?
- Calvin Day's practice location on file with NPPES is 7979 Broadway Ste 202, San Antonio, TX 78209-2657.
- What is Calvin Day's phone number?
- The practice phone number listed in the NPPES registry for Calvin Day is (210) 601-6502.
- Does Calvin Day accept Medicare?
- Calvin Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Calvin Day's NPI active?
- Yes — Calvin Day's NPI (1831379692) is active in the NPPES registry as of the last update on 2023-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.