Mark Walmer, MD
NPI 1629166053 · Internal Medicine Physician · Chandler, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Walmer, MD is a Internal Medicine Physician provider in Chandler, AZ (NPI 1629166053).
Provider details
- NPI number
- 1629166053
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 15974 (AZ)
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
19 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
15,182 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 | 1,698 | $124 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,471 | $5 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 1,379 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 1,323 | $13 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,295 | $8 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 158 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 760 | 243 |
| Levothyroxine Sodium | 574 | 172 |
| Lisinopril | 426 | 132 |
| Pantoprazole Sodium | 383 | 118 |
| Metformin Hcl | 339 | 103 |
| Simvastatin | 271 | 80 |
| Tamsulosin Hcl | 270 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-11
- Last updated
- 2011-09-16
Frequently asked questions
- What is Mark Walmer's NPI number?
- Mark Walmer's National Provider Identifier (NPI) is 1629166053, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Walmer's specialty?
- Mark Walmer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Walmer located?
- Mark Walmer's practice location on file with NPPES is 655 S Dobson Rd, Chandler, AZ 85224-5669.
- What is Mark Walmer's phone number?
- The practice phone number listed in the NPPES registry for Mark Walmer is (480) 821-3821.
- Does Mark Walmer accept Medicare?
- Mark Walmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Walmer's NPI active?
- Yes — Mark Walmer's NPI (1629166053) is active in the NPPES registry as of the last update on 2011-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.