Mary Royan, MD, MPH
NPI 1356834568 · Emergency Medicine Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Royan, MD, MPH is a Emergency Medicine Physician provider in Ann Arbor, MI (NPI 1356834568).
Provider details
- NPI number
- 1356834568
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Female
- Sole proprietor
- No
- License
- 125.071795 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
89 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 68 | $185 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 21 | $128 |
Typical Medicare-allowed amounts for these services range $128–$185 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 5841 S Maryland Ave # Mc5068Chicago, IL 60637-1443Phone: (773) 795-9758
- 1000 N Westmoreland RdLake Forest, IL 60045-1658Phone: (847) 535-6150Fax: (847) 535-7801
Registry dates
- Enumerated
- 2018-06-12
- Last updated
- 2023-07-05
- Certified
- 2023-07-05
Frequently asked questions
- What is Mary Royan's NPI number?
- Mary Royan's National Provider Identifier (NPI) is 1356834568, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Royan's specialty?
- Mary Royan is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Royan located?
- Mary Royan's practice location on file with NPPES is 1500 E Medical Center Dr, Ann Arbor, MI 48109-5000.
- What is Mary Royan's phone number?
- The practice phone number listed in the NPPES registry for Mary Royan is (734) 936-4000.
- Does Mary Royan accept Medicare?
- Mary Royan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Royan's NPI active?
- Yes — Mary Royan's NPI (1356834568) is active in the NPPES registry as of the last update on 2023-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.