MARK YAT-FUNG CHIANG (MD) – Hematology (Internal Medicine) Physician, NPI 1720034986
Hematology (Internal Medicine) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
113 HEMATOLOGY in MI
Provider Addresses for MARK YAT-FUNG CHIANG (MD)
1500 E Medical Center Dr
B1 floor Cancer Recp B
Ann Arbor, MI 481095911
Phone: (734) 936-6000
Type: Location
South State Street, Ann Arbor, Washtenaw County, Michigan, 48108-1774, United States
ANN ARBOR, MI 481081633
Phone: (734) 647-5299
Type: Mailing
Mott Children's Hospital and Von Voigtlander Women's Hospital, 1500, East Medical Center Drive, Ann Arbor, Washtenaw County, Michigan, 48109, United States
ANN ARBOR, MI 481095000
Phone: (734) 936-4000
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-03-16
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100316000877 | I | Hematology | MI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 42 | 30 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 24 | 21 | $0 |
| 99451 | Telephone, internet, or electronic health record assessment and management with written report by consulting physician, at least 5 minutes | 18 | 18 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 13 | 11 | $0 |
Insurance plans in this area (ZIP 48109)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| G A S T R O E N T E R O L O G Y | FL | |
| Physical Medicine And Rehabilitation | MI | |
| A N E S T H E S I O L O G Y | MI | |
| Internal Medicine, Pediatric Medicine | IL | |
| - | MI | |
| Physician Assistant | MI |
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