Physician Profile
Calvin L. Day, M.D.
Unclaimed ProfileAbout Dr. Day
Based in San Antonio, TX, Calvin L. Day, M.D. is listed in the NPI registry under dermatology. Calvin graduated from University of Texas Southwestern Medical School at Dallas in 1976. Calvin is also listed as specializing in mohs surgery / dermatologic surgery. According to Medicare claims data, Calvin cared for 1,701 Medicare patients across 3,279 services. The services billed most often include destruction of precancer skin growth, 2-14 growths, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and destruction of skin growth, 1-14 growths.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (210) 601-6502
- Email not available
Practice Locations
7979 BROADWAY STE 202
San Antonio, TX 78209
Conditions Commonly Evaluated or Treated
Within Dermatology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Acne and follicular disorders
Eczema and inflammatory skin disease
Infections and infestations
Pigment, growths, and benign lesions
Skin cancer
Urticaria, itch, and vascular
Autoimmune and connective tissue
Infections
Rashes & allergy
Skin growths
Procedures & services
Most searched procedures
Diagnostic procedures
Lesion treatment
- Complex skin lesion excision
- Cryotherapy for skin lesions
- Electrodesiccation and curettage
- Incision and drainage of an abscess
Medical dermatology treatment
Cosmetic
Cosmetic and minor surgery
Cosmetic dermatology
Diagnostic
General dermatology
Infections
Medical dermatology
Nails & hair
Skin cancer surgery
Skin growths
Procedures Most Often Billed to Medicare
3,279 services · 1,701 patients · 20 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
1,178 | More often than most peers in Dermatology |
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
348 | More often than most peers in Dermatology |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
293 | As often as other peers in Dermatology |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks | Procedure | 17311 |
147 | As often as other peers in Dermatology |
| Biopsy of related skin growth, first growth | Procedure | 11102 |
130 | As often as other peers in Dermatology |
| Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks | Procedure | 17312 |
88 | As often as other peers in Dermatology |
| Destruction of precancer skin growth, 15 or more growths | Procedure | 17004 |
82 | More often than most peers in Dermatology |
| Biopsy of related skin growth, each additional growth | Procedure | 11103 |
43 | As often as other peers in Dermatology |
| Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm | Procedure | 11602 |
31 | As often as other peers in Dermatology |
| Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm | Procedure | 12032 |
27 | As often as other peers in Dermatology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other dermatologists in San Antonio 8
Same specialty, same city.
Trained at University of Texas Southwestern Medical School at Dallas 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1976 at University of Texas Southwestern Medical School at Dallas 8
Providers who graduated from the same medical school in the same year.
Also performs Destruction of precancer skin growth, 2-14 growths 7
Providers in TX who bill this service to Medicare most often.
Common questions
What does Calvin L. Day specialize in?
Calvin L. Day is a dermatologist (skin doctor) in San Antonio, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Dermatology”.
NPI registry
Where is Calvin L. Day located?
Calvin L. Day is listed at 7979 Broadway Ste 202, San Antonio, TX 78209. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Calvin L. Day's phone number?
The number on file is (210) 601-6502. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Calvin L. Day's NPI number?
Calvin L. Day's National Provider Identifier is 1831379692. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Calvin L. Day train?
Calvin L. Day attended University of Texas Southwestern Medical School at Dallas, graduating in 1976. This comes from the CMS National Downloadable File.
CMS public data
How long has Calvin L. Day been practicing?
Calvin L. Day has 50 years experience. Calculated from a graduation year of 1976, reported in the CMS National Downloadable File.
CMS public data
What does Calvin L. Day do most often?
According to Medicare billing data, Calvin L. Day performs procedures including destruction of precancer skin growth, 2-14 growths, destruction of skin growth, 1-14 growths and destruction of precancer skin growth, 1 growth; provides treatments such as removal of tissue from wound, 20.0 sq cm or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Calvin L. Day confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Calvin L. Day. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.