Dr. Daniel John Hammer, MD
- Medicare services, 2024
- 1,881
- Medicare patients, 2024
- 550
- Part D claims, 2024
- 4,652
- MIPS score, 2024
- 93
- Hospital affiliations
- 1
- Practice address
- 10615 Montgomery Rd, Montgomery, OH 45242
- Practice phone
- Call (513) 793-1999
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Greater Cincinnati Surgical Associates LLC
Montgomery, Ohio
Find Dr. Hammer'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. Daniel John Hammer is an ophthalmologist in Montgomery, Ohio
Dr. Hammer practices at Greater Cincinnati Surgical Associates LLC in Montgomery, Ohio.
Dr. Hammer's NPI, 1346575479, was assigned on October 7, 2009. Dr. Hammer graduated from Ohio State University College of Medicine in 2009. Dr. Hammer holds Missouri license 2010012715.
- NPI
- 1346575479NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274774724
- NPI enumeration date
- October 7, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (513) 793-1999
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel John Hammer practices at Greater Cincinnati Surgical Associates LLC in Montgomery, Ohio
Dr. Hammer's primary practice is Greater Cincinnati Surgical Associates LLC, at 10615 Montgomery Rd, Montgomery, OH 45242 in Hamilton County. The practice phone is (513) 793-1999.
- Greater Cincinnati Surgical Associates LLC10615 Montgomery Rd, Montgomery, OH 45242 · Hamilton CountyPhone(513) 793-1999
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Daniel John Hammer is affiliated with 3 sites of care and 2 medical groups
Dr. Hammer's primary practice is Greater Cincinnati Surgical Associates LLC in Montgomery, Ohio. Dr. Hammer is also affiliated with Bethesda North Hospital. The medical group on file is University of Cincinnati Physicians. Dmand AI also links Dr. Hammer to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Daniel John Hammer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hammer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greater Cincinnati Surgical Associates LLC | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel John Hammer is one of 658 ophthalmologists in Ohio
Ophthalmology is Dr. Hammer's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Hammer is licensed in Missouri.
Specialties and state licenses
- Ophthalmology, MissouriPrimary
Ophthalmologists near Dr. Hammer
Counts of ophthalmologists 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. Daniel John Hammer billed Medicare for 1,881 services in 2024
CMS data shows 1,881 Medicare services from Dr. Hammer across 14 procedure codes in 2024, for 550 Medicare patients. Medicare paid $153,668 for them.
Dr. Hammer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 9282024: 9231%
- Office and hospital visits
- 2023: 7772024: 7405%
- Surgery
- 2023: 1832024: 21819%
Where Dr. Hammer's Medicare services took place, 2024
- In an office1,73692%
- In a facility1458%
Dr. Hammer compared with the Ohio median for ophthalmologists, 2024
- Dr. Hammer
- Ohio median
- Medicare services
- 1,881vs 1,18559% above
- Medicare patients
- 550vs 47715% above
- Part D claims
- 4,546vs 6417.1 times
Medians across 673 ophthalmologists in Ohio with Dmand AI profiles that report each measure.
Dr. Hammer'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. Hammer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hammer and other ophthalmologists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel John Hammer treated 550 Medicare patients in 2024, average age 76
CMS counts 550 Medicare patients who saw Dr. Hammer in 2024. The largest group is 65 to 74, with 249 patients. 73% of them have high cholesterol, and 68% have high blood pressure. 2% are also on Medicaid. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hammer's median patient age at 72, with 55% women.
Dr. Hammer's Medicare patients by age, 2024
Dr. Hammer's Medicare patients by sex, 2024
- Women30555%
- Men24545%
Chronic conditions among Dr. Hammer's Medicare patients, 2024
- High cholesterol73%
- High blood pressure68%
- Arthritis39%
- Diabetes29%
- Ischemic heart disease25%
- Chronic kidney disease20%
- Anxiety19%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hammer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel John Hammer wrote 4,652 Medicare Part D claims in 2024
In 2024, Dr. Hammer wrote 4,652 Medicare Part D claims for 806 patients. 64% of them were for generic drugs. CMS names the drug for 4,546 of them, across 32 drugs with 11 or more claims each, at $460,953 in total drug cost. In 2023, CMS named 3,884 claims across 26 drugs.
Dr. Hammer's Part D claims by kind of drug, 2024
- Generic2,997 claims64%
- Brand-name1,655 claims36%
Dr. Hammer'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. Hammer's Part D claims, 2024
- Antibiotics0%11 of 4,652 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: 3,8842024: 4,54617%
Drugs named by CMS: 32 in 2024, 26 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. Daniel John Hammer scored 93 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 93 out of 100 for Dr. Hammer for performance year 2024, reported through an alternative payment model (APM). Dr. Hammer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 169 procedures of cataract surgery by Dr. Hammer, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Hammer's MIPS scores, performance year 2024
- 93of 100Final score
- 86of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Hammer ranks in Medicare procedure volume
- Cataract surgery
- 81st percentile169 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Daniel John Hammer received $10,445 in industry payments from 2016 to 2025
CMS Open Payments shows 218 general payments to Dr. Hammer from 27 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 60% of the total. Reliance Medical Products, Inc. paid the most, $3,000.
General payments to Dr. Hammer by program year, 2016 to 2025
General payments to Dr. Hammer by kind, 2016 to 2025
- Food and beverage$6,24960%
- Consulting fees$3,00029%
- Travel and lodging$1,00210%
- Education$1942%
Companies that paid Dr. Hammer 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. Daniel John Hammer graduated from Ohio State University College of Medicine
Dr. Hammer graduated from Ohio State University College of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Daniel John Hammer'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Clinician Public Reporting: Overall MIPS Performance (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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Daniel John Hammer
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. Daniel John Hammer's NPI number?
Dr. Daniel John Hammer's NPI number is 1346575479. It was assigned on October 7, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel John Hammer?
Dr. Daniel John Hammer is an ophthalmologist in Montgomery, Ohio. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Daniel John Hammer practice?
Dr. Hammer practices at 10615 Montgomery Rd, Montgomery, OH 45242. Dr. Hammer's primary practice is Greater Cincinnati Surgical Associates LLC in Montgomery, Ohio. Dmand AI also links Dr. Hammer to 1 group practice or clinic and 1 medical group.
What is Dr. Daniel John Hammer's office phone number?
The practice phone on file for Dr. Hammer is (513) 793-1999.
What is Dr. Daniel John Hammer's medical license number?
Dr. Hammer holds Missouri license 2010012715.
Which hospitals is Dr. Daniel John Hammer affiliated with?
Dr. Hammer is affiliated with Bethesda North Hospital.
What medical group is Dr. Daniel John Hammer part of?
Dr. Hammer is linked to University of Cincinnati Physicians. Dmand AI links Dr. Hammer to 1 more medical group.
Does Dr. Daniel John Hammer accept Medicare?
Yes. CMS data shows Dr. Hammer billed Medicare for 1,881 services in 2024, and Dr. Hammer accepts Medicare assignment.
What is Dr. Daniel John Hammer's MIPS score?
Dr. Hammer's MIPS final score for performance year 2024 is 93 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Daniel John Hammer see?
CMS counts 550 Medicare patients who saw Dr. Hammer in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Daniel John Hammer bill to Medicare?
In 2024, Dr. Hammer's most billed Medicare services were office visit, established patient (99213), eye exam or test (92133) and eye exam or test (92083).
Where did Dr. Daniel John Hammer go to medical school?
Dr. Hammer graduated from Ohio State University College of Medicine in 2009.
What drugs does Dr. Daniel John Hammer prescribe most?
In 2024 Medicare Part D data, Dr. Hammer's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Prednisolone Acetate.
Has Dr. Daniel John Hammer received payments from drug or device companies?
CMS Open Payments shows $10,445 in general payments to Dr. Hammer from 27 companies from 2016 to 2025. The largest total came from Reliance Medical Products, Inc.
How long has Dr. Daniel John Hammer been practicing?
Dr. Hammer graduated from medical school in 2009, 17 years ago.
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