Erin Diviney Chun, MD
NPI 1215120738 · Geriatric Medicine (Internal Medicine) Physician · Ann Arbor, MI
Enrolled with Medicare as Practitioner - Geriatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Diviney Chun, MD is a Geriatric Medicine (Internal Medicine) Physician provider in Ann Arbor, MI (NPI 1215120738).
Provider details
- NPI number
- 1215120738
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301086375 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
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
174 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) |
|---|---|---|
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 64 | $182 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 55 | $107 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 21 | $133 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 17 | $107 |
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 17 | $154 |
Typical Medicare-allowed amounts for these services range $107–$182 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 94 | 25 |
| Tamsulosin Hcl | 68 | 11 |
| Levothyroxine Sodium | 54 | 17 |
| Trazodone Hcl | 54 | 11 |
| Apixabanbrand: Eliquis | 42 | 12 |
| Sertraline Hcl | 40 | 11 |
| Prednisone |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-20
- Last updated
- 2019-05-24
Frequently asked questions
- What is Erin Diviney Chun's NPI number?
- Erin Diviney Chun's National Provider Identifier (NPI) is 1215120738, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Diviney Chun's specialty?
- Erin Diviney Chun is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Erin Diviney Chun located?
- Erin Diviney Chun's practice location on file with NPPES is 4260 Plymouth Rd, Ann Arbor, MI 48109-2700.
- What is Erin Diviney Chun's phone number?
- The practice phone number listed in the NPPES registry for Erin Diviney Chun is (734) 764-6831.
- Does Erin Diviney Chun accept Medicare?
- Erin Diviney Chun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Diviney Chun's NPI active?
- Yes — Erin Diviney Chun's NPI (1215120738) is active in the NPPES registry as of the last update on 2019-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.