Doctor profile · Federal record

Dr. Megan Mack, M.D.

Internal Medicine Physician (CMS: Internal Medicine) · Ann Arbor, MI

  • NPI 1255531737
  • Accepts Medicare
  • 19 yrs in practice
  • Female
  • Group practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
1500 E Medical Center Dr
Ann Arbor, MI 481095000
(734) 936-4000
Mailing address
3621 S State St
Ann Arbor, MI 481081633

Credentials & registration

NPPES · NUCC
NPI registered
July 2007 — 19 yrs on file
Profile last updated
February 11, 2020
Year of graduation
2007 — 19 yrs since
Specialty taxonomy
207R00000X — NUCC code
State license (1)
Michigan #4301090122

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1255531737. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
175
Distinct HCPCS
4
Medicare allowed
$19,500
HCPCS Description Services Patients Avg allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 112 52 $120
99239 Hospital discharge day management, more than 30 minutes 26 26 $117
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 25 12 $81
99238 Hospital discharge day management, 30 minutes or less 12 12 $82

In context: peer comparison

Among 135 peers in this city , average services per provider: 77. This provider delivers 2.3× the peer median.

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Megan Mack's medical specialty?
Dr. Megan Mack practices Internal Medicine Physician in Ann Arbor, MI.
Where does Dr. Megan Mack practice?
Dr. Megan Mack practices at 1500 E Medical Center Dr, Ann Arbor, MI 481095000. Office phone: 7349364000.
What is Dr. Megan Mack's NPI?
Dr. Megan Mack's National Provider Identifier (NPI) is 1255531737, issued by NPPES.
Does Dr. Megan Mack accept Medicare assignment?
Yes. Dr. Megan Mack accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Megan Mack commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.