Marty Mertens, M.D.
NPI 1558555896 · Rheumatology Physician · Woodbury, MN
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marty Mertens, M.D. is a Rheumatology Physician provider in Woodbury, MN (NPI 1558555896).
Provider details
- NPI number
- 1558555896
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 53102 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 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
1,532 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 | 232 | $124 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 224 | $8 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 162 | $9 |
| Measurement C-Reactive Protein for Detection of Infection Or Inflammation86140 | 125 | $5 |
| Blood Creatinine Level82565 | 115 | $5 |
| Liver Enzyme (sgpt), Level84460 | 109 | $5 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 357 | 135 |
| Methotrexate Sodiumbrand: Methotrexate | 349 | 110 |
| Hydroxychloroquine Sulfate | 313 | 105 |
| Leucovorin Calcium | 117 | 39 |
| Leflunomide | 104 | 33 |
| Sulfasalazine | 78 | 22 |
| Celecoxib | 77 | 27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-29
- Last updated
- 2023-05-25
- Certified
- 2023-05-25
Frequently asked questions
- What is Marty Mertens's NPI number?
- Marty Mertens's National Provider Identifier (NPI) is 1558555896, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marty Mertens's specialty?
- Marty Mertens is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Marty Mertens located?
- Marty Mertens's practice location on file with NPPES is 4040 Radio Dr, Woodbury, MN 55129-3237.
- What is Marty Mertens's phone number?
- The practice phone number listed in the NPPES registry for Marty Mertens is (651) 439-8807.
- Does Marty Mertens accept Medicare?
- Marty Mertens is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marty Mertens's NPI active?
- Yes — Marty Mertens's NPI (1558555896) is active in the NPPES registry as of the last update on 2023-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.