Mark Key, M.D.
NPI 1861684441 · Family Medicine Physician · Lubbock, TX
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Key, M.D. is a Family Medicine Physician provider in Lubbock, TX (NPI 1861684441).
Provider details
- NPI number
- 1861684441
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- N1362 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 178 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 563 | 165 |
| Metformin Hcl | 346 | 102 |
| Lisinopril | 321 | 103 |
| Amlodipine Besylate | 317 | 95 |
| Pantoprazole Sodium | 298 | 87 |
| Atorvastatin Calcium | 278 | 79 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$157 across 9 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
Additional practice locations (1)
- 2200 N Bryan AveLamesa, TX 79331-2451Phone: (806) 872-7291Fax: (806) 872-6550
Registry dates
- Enumerated
- 2007-08-16
- Last updated
- 2025-12-15
- Certified
- 2025-12-15
Frequently asked questions
- What is Mark Key's NPI number?
- Mark Key's National Provider Identifier (NPI) is 1861684441, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Key's specialty?
- Mark Key is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Key located?
- Mark Key's practice location on file with NPPES is 5512 114th St, Lubbock, TX 79424-2177.
- What is Mark Key's phone number?
- The practice phone number listed in the NPPES registry for Mark Key is (806) 288-1075.
- Does Mark Key accept Medicare?
- Mark Key is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Key's NPI active?
- Yes — Mark Key's NPI (1861684441) is active in the NPPES registry as of the last update on 2025-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.