Naomi H. Chen, MD

Medicare activity in 2024

Official CMS public-use data for Naomi H. 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)50 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)33 services
3. Partial removal of breast (19301)17 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)16 services
5. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)15 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 pressure74%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)74%
• Arthritis57%
• Diabetes34%
• Chronic kidney disease34%

Hospitals where Naomi H. Chen works

Medicare's Facility Affiliation Data lists Naomi H. 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.

• Grant Medical CenterColumbus, OH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 360017
• Mount Carmel DublinDublin, OH · Acute Care Hospital · Emergency services: listed by Medicare · CCN 360375
• Mount Carmel East & WestColumbus, OH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 360035
• Mount Carmel St Ann'sWesterville, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360012
• Riverside Methodist HospitalColumbus, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360006

Practice locations

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

• 561 W Central AveDelaware, OH 43015 (740) 615‑1000

Specialties

• General Surgeryprimary

Find other General Surgery doctors in Ohio →

Other general surgeons in Delaware

Clinicians with the same Medicare primary specialty in Delaware, OH — not a recommendation.

• Kenneth C. Graffeo, MD
• Sally A. George, MD
• Michael T. Cray, MD

All general surgeons in Delaware →

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