Dr. John H. Ahn, DO
- Medicare services, 2024
- 842
- Medicare patients, 2024
- 430
- Part D claims, 2024
- 836
- Hospital affiliations
- 3
- Industry payments
- $4,279
- Practice address
- 3231 McMullen Booth Rd, Safety Harbor, FL 34695
- Practice phone
- Call (727) 734-6950
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ahn's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John H. Ahn is a gastroenterologist in Safety Harbor, Florida
Dr. Ahn practices at BayCare Mease Countryside Hospital in Safety Harbor, Florida, part of BayCare Health System.
Dr. Ahn's NPI, 1598790701, was assigned on July 12, 2006. Dr. Ahn graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury in 1988. Dr. Ahn holds Florida license OS7005.
- NPI
- 1598790701NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618943713
- NPI enumeration date
- July 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (727) 734-6950
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John H. Ahn practices at BayCare Mease Countryside Hospital in Safety Harbor, Florida
Dr. Ahn's primary practice is BayCare Mease Countryside Hospital, at 3231 McMullen Booth Rd, Safety Harbor, FL 34695 in Pinellas County. The practice phone is (727) 734-6950.
- BayCare Mease Countryside Hospital3231 McMullen Booth Rd, Safety Harbor, FL 34695 · Pinellas CountyPhone(727) 734-6950
Source: Dmand AI Affiliation Data
Dr. John H. Ahn is affiliated with 5 sites of care and 2 medical groups
Dr. Ahn's primary practice is BayCare Mease Countryside Hospital in Safety Harbor, Florida, part of BayCare Health System. Dr. Ahn is also affiliated with HCA Florida West Hospital. The medical group on file is Gastro Florida. Dmand AI also links Dr. Ahn to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John H. Ahn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ahn practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| BayCare Mease Countryside Hospital | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John H. Ahn is one of 1,364 gastroenterologists in Florida
Gastroenterology is Dr. Ahn's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Ahn is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Ahn is licensed in Florida.
Specialties and state licenses
- Gastroenterology, FloridaPrimary
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, chronic indigestion, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, fatty liver and gastroduodenitis among the conditions Dr. Ahn treats.
Gastroenterologists near Dr. Ahn
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John H. Ahn billed Medicare for 842 services in 2024
CMS data shows 842 Medicare services from Dr. Ahn across 11 procedure codes in 2024, for 430 Medicare patients. Medicare paid $85,178 for them.
Dr. Ahn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6062024: 5814%
- Surgery
- 2023: 2172024: 2201%
- Other services
- 2023: 512024: 4120%
Where Dr. Ahn's Medicare services took place, 2024
- In an office52262%
- In a facility32038%
Dr. Ahn compared with the Florida median for gastroenterologists, 2024
- Dr. Ahn
- Florida median
- Medicare services
- 842vs 58245% above
- Medicare patients
- 430vs 32234% above
- Part D claims
- 716vs 50243% above
Medians across 1,320 gastroenterologists in Florida with Dmand AI profiles that report each measure.
Dr. Ahn's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Ahn?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ahn and other gastroenterologists in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John H. Ahn treated 430 Medicare patients in 2024, average age 74
CMS counts 430 Medicare patients who saw Dr. Ahn in 2024. The largest group is 65 to 74, with 225 patients. 75% of them have high cholesterol, and 74% have high blood pressure. Their average risk score is 1.29, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ahn's median patient age at 68, with 50% women.
Dr. Ahn's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ahn's Medicare patients by sex, 2024
- Women24457%
- Men18643%
Chronic conditions among Dr. Ahn's Medicare patients, 2024
- High cholesterol75%
- High blood pressure74%
- Arthritis50%
- Ischemic heart disease45%
- Chronic kidney disease30%
- Mood disorders30%
- Anxiety29%
- Depression28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ahn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women50%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John H. Ahn wrote 836 Medicare Part D claims in 2024
In 2024, Dr. Ahn wrote 836 Medicare Part D claims for 302 patients. 86% of them were for generic drugs. CMS names the drug for 716 of them, across 19 drugs with 11 or more claims each, at $141,601 in total drug cost. In 2023, CMS named 632 claims across 15 drugs.
Dr. Ahn's Part D claims by kind of drug, 2024
- Generic723 claims86%
- Brand-name113 claims14%
Dr. Ahn's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ahn's Part D claims, 2024
- Antibiotics3%27 of 836 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6322024: 71613%
Drugs named by CMS: 19 in 2024, 15 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John H. Ahn ranks in the 63rd percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Ahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 49 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Ahn, more than 63% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Ahn ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 63rd percentile49 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John H. Ahn received $4,279 in industry payments from 2016 to 2025
CMS Open Payments shows 200 general payments to Dr. Ahn from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $1,095.
General payments to Dr. Ahn by program year, 2016 to 2025
General payments to Dr. Ahn by kind, 2016 to 2025
- Food and beverage$4,272100%
- Education$70%
Companies that paid Dr. Ahn the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John H. Ahn has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Ahn, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Ahn
- 2013
- CMS Stage 1 EHR
- Undated
- Super Doc
Source: Dmand AI Professional Profile Data
Dr. John H. Ahn graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury
Dr. Ahn graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury in 1988.
- Medical school
- Board certified in gastroenterology
- Board certified in 1995 - 2026
- Board certified in 1996 - 2001
- Board certified in 1996 - 2000
Source: Dmand AI Professional Profile Data
Dr. John H. Ahn accepts plans from 19 insurance carriers
Dr. Ahn is in network with 19 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- Elevance
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- +11 more carriersWith a free account
Plan types Dr. Ahn accepts, by number of carriers
- PPO11
- HMO10
- Medicare9
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. John H. Ahn's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John H. Ahn
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John H. Ahn's NPI number?
Dr. John H. Ahn's NPI number is 1598790701. It was assigned on July 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John H. Ahn?
Dr. John H. Ahn is a gastroenterologist in Safety Harbor, Florida. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. John H. Ahn practice?
Dr. Ahn practices at 3231 McMullen Booth Rd, Safety Harbor, FL 34695. Dr. Ahn's primary practice is BayCare Mease Countryside Hospital in Safety Harbor, Florida, part of BayCare Health System. Dmand AI also links Dr. Ahn to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Dr. John H. Ahn's office phone number?
The practice phone on file for Dr. Ahn is (727) 734-6950.
What is Dr. John H. Ahn's medical license number?
Dr. Ahn holds Florida license OS7005.
Which hospitals is Dr. John H. Ahn affiliated with?
Dr. Ahn practices at BayCare Mease Countryside Hospital in Safety Harbor, Florida. Dr. Ahn is also affiliated with HCA Florida West Hospital. Dmand AI links Dr. Ahn to 1 more hospital.
What medical group is Dr. John H. Ahn part of?
Dr. Ahn is linked to Gastro Florida. Dmand AI links Dr. Ahn to 1 more medical group.
Does Dr. John H. Ahn accept Medicare?
Yes. CMS data shows Dr. Ahn billed Medicare for 842 services in 2024, and Dr. Ahn accepts Medicare assignment.
How many Medicare patients does Dr. John H. Ahn see?
CMS counts 430 Medicare patients who saw Dr. Ahn in 2024, with an average age of 74.
Is Dr. John H. Ahn board certified?
Yes. Dr. Ahn is board certified in gastroenterology by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. John H. Ahn bill to Medicare?
In 2024, Dr. Ahn's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and office visit, established patient (99213).
Where did Dr. John H. Ahn go to medical school?
Dr. Ahn graduated from New York Institute of Technology College of Osteopathic Medicine - Old Westbury in 1988.
What drugs does Dr. John H. Ahn prescribe most?
In 2024 Medicare Part D data, Dr. Ahn's most prescribed drugs by claims were Pantoprazole Sodium, Famotidine and Sod Sulf-Potass Sulf-Mag Sulf.
Has Dr. John H. Ahn received payments from drug or device companies?
CMS Open Payments shows $4,279 in general payments to Dr. Ahn from 28 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. John H. Ahn been practicing?
Dr. Ahn graduated from medical school in 1988, 38 years ago.
What insurance does Dr. John H. Ahn accept?
Dr. Ahn is in network with 19 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
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