Mark Zahn, D.D.S.,M.S., P.C.
NPI 1598784837 · Periodontics · Ann Arbor, MI
Enrolled with Medicare as Order and Referring Only - Oral Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Zahn, D.D.S.,M.S., P.C. is a Periodontics provider in Ann Arbor, MI (NPI 1598784837).
Provider details
- NPI number
- 1598784837
- Entity type
- Individual
- Primary specialty
- PeriodonticsDental Providers
- Credential
- D.D.S.,M.S., P.C.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2901014883 (MI)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 123 | 98 |
| Ibuprofen | 120 | 94 |
| Tramadol Hcl | 28 | 21 |
| Ibuprofenbrand: Ibu | 24 | 18 |
| Azithromycin | 20 | 15 |
| Fluoride (sodium)brand: Sodium Fluoride | 17 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$501 across 3 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
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2021-10-08
- Certified
- 2021-10-08
Frequently asked questions
- What is Mark Zahn's NPI number?
- Mark Zahn's National Provider Identifier (NPI) is 1598784837, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Zahn's specialty?
- Mark Zahn is listed in the NPPES registry with a primary specialty of Periodontics (Dental Providers).
- Where is Mark Zahn located?
- Mark Zahn's practice location on file with NPPES is 2207 Jackson Ave, Ann Arbor, MI 48103-3919.
- What is Mark Zahn's phone number?
- The practice phone number listed in the NPPES registry for Mark Zahn is (734) 994-9145.
- Does Mark Zahn accept Medicare?
- Mark Zahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Zahn's NPI active?
- Yes — Mark Zahn's NPI (1598784837) is active in the NPPES registry as of the last update on 2021-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.