Diana M. Chen, MD

Medicare activity in 2024

Official CMS public-use data for Diana M. Chen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Injection, denosumab, 1 mg (J0897)1,080 services
2. Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days (99454)282 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)184 services
4. Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)139 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)106 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol75%
• High blood pressure73%
• Depression67%
• Arthritis47%
• Anxiety35%
• Diabetes30%

Hospitals where Diana M. Chen works

Medicare's Facility Affiliation Data lists Diana M. Chen 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.

• Hillcrest Hospital SouthTulsa, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370202
• Hillcrest Medical CenterTulsa, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370001

Practice locations

Addresses where Diana M. Chen is enrolled with Medicare (CMS data updated October 2, 2026).

• 4408 S Harvard AveTulsa, OK 74135 (918) 574‑0350

Group practices

Medicare enrollment lists Diana M. Chen as a member of this group (CMS data updated October 2, 2026).

• Ahs Oklahoma Physician Group LLC313 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Oklahoma →

Other internal medicine doctors in Tulsa

Clinicians with the same Medicare primary specialty in Tulsa, OK — not a recommendation.

• Paul G. Hendrix, MD
• Rizwan Shahid, MD
• Gerald Reed, DO
• Jennifer Cox, DO
• Vandana Gupta, MD
• Micah Derby, DO
• Audrey Corbett, MD
• Tristan D. Smith, DO

All internal medicine doctors in Tulsa →

Other clinicians in Ahs Oklahoma Physician Group LLC

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

• Milton K. Omondi, NP
• Lindsey N. Buzzelli
• Kala M. Gaydos, NP
• Claudia E. Cea, MD
• Angie Hignite, PA
• Roderick N. Purdie, MD

Clinician information

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. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians