John Carmack, MD
NPI 1639152812 · Family Medicine Physician · Forest, VA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Carmack, MD is a Family Medicine Physician provider in Forest, VA (NPI 1639152812).
Provider details
- NPI number
- 1639152812
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 0101045367 (VA)
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
5,827 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 614 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 591 | $124 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 488 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 477 | $8 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 454 | $8 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 123 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 498 | 153 |
| Lisinopril | 386 | 114 |
| Metformin Hcl | 377 | 119 |
| Omeprazole | 317 | 98 |
| Amlodipine Besylate | 311 | 93 |
| Losartan Potassium | 292 | 84 |
| Simvastatin | 291 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$909 across 47 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
- 2005-11-22
- Last updated
- 2013-08-13
Frequently asked questions
- What is John Carmack's NPI number?
- John Carmack's National Provider Identifier (NPI) is 1639152812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Carmack's specialty?
- John Carmack is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Carmack located?
- John Carmack's practice location on file with NPPES is 1175 Corporate Park Dr, Forest, VA 24551-2238.
- What is John Carmack's phone number?
- The practice phone number listed in the NPPES registry for John Carmack is (434) 525-6964.
- Does John Carmack accept Medicare?
- John Carmack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Carmack's NPI active?
- Yes — John Carmack's NPI (1639152812) is active in the NPPES registry as of the last update on 2013-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.