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Obstetrics/Gynecology

Humma I. Tiwana, MD

Works at hospitals in Columbia, MD · Maryland

Summary

Dr. Humma I. Tiwana, MD is an OB-GYN at 12137 Elm St, Princess Anne, MD 21853. Phone: (410) 651-1000. May accept Medicare assignment. NPI 1235370024. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026.

  • Specialty: OB-GYN (Medicare lists Obstetrics/Gynecology)
  • Address: 12137 Elm St, Princess Anne, MD 21853 · Directions (3 more locations)
  • Phone: (410) 651‑1000
  • Medicare: May accept Medicare assignment
  • Hospital: Johns Hopkins Howard County Medical Center
  • Group practice: Johns Hopkins University (+2 more)
  • Medical school: graduated 1998 (28 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Humma I. Tiwana, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Humma I. Tiwana accept Medicare assignment?
Medicare's clinician data says Humma I. Tiwana may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
What is Humma I. Tiwana's NPI number?
1235370024. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Humma I. Tiwana works

Medicare's Facility Affiliation Data lists Humma I. Tiwana at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Humma I. Tiwana is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Humma I. Tiwana as a member of these groups (CMS data updated October 2, 2026).

  • Johns Hopkins University2,909 clinicians in the group
  • Community Medical Associates Inc1,372 clinicians in the group
  • Three Lower Counties Community Services Inc72 clinicians in the group

Specialties

Find other Obstetrics/Gynecology doctors in Maryland →

Other OB-GYNs in Princess Anne

Clinicians with the same Medicare primary specialty in Princess Anne, MD — not a recommendation.

All OB-GYNs in Princess Anne →

Other clinicians in Johns Hopkins University

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year1998 (28 years since medical school)
Gender (as listed)Female
Medicare assignmentMay accept for some services
NPI (National Provider Identifier)1235370024
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  5. Medicare Care Compare — official Medicare tool to look up clinicians