Zachary Tolstyka, MD
NPI 1518596238 · Pediatric Hematology & Oncology Physician · Ann Arbor, MI
Enrolled with Medicare as Order and Referring Only - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Tolstyka, MD is a Pediatric Hematology & Oncology Physician provider in Ann Arbor, MI (NPI 1518596238).
Provider details
- NPI number
- 1518596238
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301508837 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-04-04
- Last updated
- 2023-07-07
- Certified
- 2023-07-07
Frequently asked questions
- What is Zachary Tolstyka's NPI number?
- Zachary Tolstyka's National Provider Identifier (NPI) is 1518596238, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Tolstyka's specialty?
- Zachary Tolstyka is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Tolstyka located?
- Zachary Tolstyka's practice location on file with NPPES is 1522 Simpson Road East, Ann Arbor, MI 48109-5718.
- What is Zachary Tolstyka's phone number?
- The practice phone number listed in the NPPES registry for Zachary Tolstyka is (734) 232-5933.
- Does Zachary Tolstyka accept Medicare?
- Zachary Tolstyka is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Tolstyka's NPI active?
- Yes — Zachary Tolstyka's NPI (1518596238) is active in the NPPES registry as of the last update on 2023-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.