Mark Nelson, M.D.
NPI 1821307141 · Family Medicine Physician · Fort Worth, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Nelson, M.D. is a Family Medicine Physician provider in Fort Worth, TX (NPI 1821307141).
Provider details
- NPI number
- 1821307141
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- H5791 (TX)
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
15 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
51 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $65 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 24 | $96 |
Typical Medicare-allowed amounts for these services range $65–$96 (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 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 80 | 26 |
| Metformin Hcl | 60 | 13 |
| Diclofenac Sodium | 53 | — |
| Amlodipine Besylate | 51 | 15 |
| Pantoprazole Sodium | 41 | 11 |
| Famotidine | 33 | — |
| Losartan Potassium | 29 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-10-04
- Last updated
- 2014-06-27
Frequently asked questions
- What is Mark Nelson's NPI number?
- Mark Nelson's National Provider Identifier (NPI) is 1821307141, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Nelson's specialty?
- Mark Nelson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Nelson located?
- Mark Nelson's practice location on file with NPPES is 1500 S Main St, Fort Worth, TX 76104-4917.
- What is Mark Nelson's phone number?
- The practice phone number listed in the NPPES registry for Mark Nelson is (817) 926-1235.
- Does Mark Nelson accept Medicare?
- Mark Nelson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Nelson's NPI active?
- Yes — Mark Nelson's NPI (1821307141) is active in the NPPES registry as of the last update on 2014-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.