Mark Simpson, M.D.
NPI 1407837891 · Family Medicine Physician · Hixson, TN
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Simpson, M.D. is a Family Medicine Physician provider in Hixson, TN (NPI 1407837891).
Provider details
- NPI number
- 1407837891
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 19467 (TN)
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
20 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
180 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 54 | $116 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 50 | $83 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 27 | $83 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 20 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 17 | $166 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 94 | 45 |
| Gabapentin | 85 | 22 |
| Oxycodone Hcl | 76 | 12 |
| Alprazolam | 74 | — |
| Azithromycin | 72 | 40 |
| Amlodipine Besylate | 69 | 25 |
| Estradiol | 68 | 30 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-11
- Last updated
- 2024-06-25
- Certified
- 2024-06-25
Frequently asked questions
- What is Mark Simpson's NPI number?
- Mark Simpson's National Provider Identifier (NPI) is 1407837891, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Simpson's specialty?
- Mark Simpson is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Simpson located?
- Mark Simpson's practice location on file with NPPES is 4513 Hixson Pike, Hixson, TN 37343-5039.
- What is Mark Simpson's phone number?
- The practice phone number listed in the NPPES registry for Mark Simpson is (423) 298-7071.
- Does Mark Simpson accept Medicare?
- Mark Simpson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Simpson's NPI active?
- Yes — Mark Simpson's NPI (1407837891) is active in the NPPES registry as of the last update on 2024-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.