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Dr. Michael R. Hahn II, MD
NPI1891784237PAC ID8527046796
- Medicare services, 2024
- 1,627
- Medicare patients, 2024
- 657
- Part D claims, 2024
- 360
- Publications
- 2
- MIPS score, 2024
- 86
- Practice address
- 1000 North Lee Avenue, Oklahoma City, OK 73101
- Practice phone
- Call (405) 272-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Hahn'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. Michael R. Hahn II is a neurosurgeon in Oklahoma City, Oklahoma
Dr. Hahn practices at SSM Health St. Anthony Hospital - Oklahoma City in Oklahoma City, Oklahoma, part of SSM Health Care.
Dr. Hahn's NPI, 1891784237, was assigned on October 18, 2005. Dr. Hahn graduated from University of Oklahoma College of Medicine in 1992. Dr. Hahn holds Oklahoma license 18431.
NPI and contact details
- NPI
- 1891784237NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527046796
- NPI enumeration date
- October 18, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (405) 272-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael R. Hahn II practices at SSM Health St. Anthony Hospital - Oklahoma City in Oklahoma City, Oklahoma
Dr. Hahn's primary practice is SSM Health St. Anthony Hospital - Oklahoma City, at 1000 North Lee Avenue, Oklahoma City, OK 73101 in Oklahoma County. The practice phone is (405) 272-7000.
- SSM Health St. Anthony Hospital - Oklahoma City1000 North Lee Avenue, Oklahoma City, OK 73101 · Oklahoma CountyPhone(405) 272-7000
Source: Dmand AI Affiliation Data
Dr. Michael R. Hahn II is affiliated with 8 sites of care and 2 medical groups
Dr. Hahn's primary practice is SSM Health St. Anthony Hospital - Oklahoma City in Oklahoma City, Oklahoma, part of SSM Health Care. Dr. Hahn is also affiliated with Memorial Health System of Southwest Oklahoma. The medical group on file is SSM Health Medical Group. Dmand AI also links Dr. Hahn to 3 more hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group, each named with a free account.
Memorial Health System of Southwest OklahomaSSM Health Medical Group3 hospitalsNames with a free account2 group practices and clinicsNames with a free account1 home health agencyName with a free account1 medical groupName with a free account
See all 10 affiliations for Dr. HahnSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael R. Hahn II's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahn practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Anthony Hospital - Oklahoma City | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Hahn practices
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Dr. Michael R. Hahn II is one of 98 neurosurgeons in Oklahoma
Neurological surgery is Dr. Hahn's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Hahn is licensed in Oklahoma.
Specialties and state licenses
- Neurological surgery, OklahomaPrimary
Neurosurgeons near Dr. Hahn
Counts of neurosurgeons 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. Michael R. Hahn II billed Medicare for 1,627 services in 2024
CMS data shows 1,627 Medicare services from Dr. Hahn across 16 procedure codes in 2024, for 657 Medicare patients. Medicare paid $228,888 for them.
Medicare services, 20241,627
Medicare patients657
Paid by Medicare$228,888
Procedure codes16
Dr. Hahn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1972024: 1,42719%
- Surgery
- 2023: 2802024: 20029%
Where Dr. Hahn's Medicare services took place, 2024
- In an office90255%
- In a facility72545%
Dr. Hahn compared with the Oklahoma median for neurosurgeons, 2024
- Dr. Hahn
- Oklahoma median
- Medicare services
- 1,627vs 4044.0 times
- Medicare patients
- 657vs 1923.4 times
- Part D claims
- 312vs 1013.1 times
Medians across 82 neurosurgeons in Oklahoma with Dmand AI profiles that report each measure.
Dr. Hahn'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. Hahn?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hahn and other neurosurgeons in Oklahoma.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael R. Hahn II treated 657 Medicare patients in 2024, average age 73
CMS counts 657 Medicare patients who saw Dr. Hahn in 2024. The largest group is 65 to 74, with 299 patients. 75% of them have arthritis, and 75% have high blood pressure. 8% are also on Medicaid. Their average risk score is 1.45, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hahn's median patient age at 68, with 57% women.
Medicare patients, 2024657
Average age73
Average risk score1.45
Also on Medicaid8%
Dr. Hahn's Medicare patients by age, 2024
Dr. Hahn's Medicare patients by sex, 2024
- Women34452%
- Men31348%
Chronic conditions among Dr. Hahn's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Anxiety40%
- Mood disorders40%
- Ischemic heart disease39%
- Depression38%
- Diabetes37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hahn'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
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael R. Hahn II wrote 360 Medicare Part D claims in 2024
In 2024, Dr. Hahn wrote 360 Medicare Part D claims for 151 patients. 100% of them were for generic drugs. CMS names the drug for 312 of them, across 6 drugs with 11 or more claims each, at $3,432 in total drug cost. In 2023, CMS named 305 claims across 7 drugs.
Part D claims, 2024360
Drugs named by CMS6
Total drug cost$3,432
Part D patients151
Dr. Hahn's Part D claims by kind of drug, 2024
- Generic359 claims100%
- Brand-name and other1 claims0%
Dr. Hahn'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. Hahn's Part D claims, 2024
- Opioids50%181 of 360 claims
- Antibiotics4%13 of 360 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: 3052024: 3122%
Drugs named by CMS: 6 in 2024, 7 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. Michael R. Hahn II scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Hahn for performance year 2024, reported as part of a group. Dr. Hahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 338 procedures of spinal fusion by Dr. Hahn, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Hahn's MIPS scores, performance year 2024
- 86of 100Final score
- 80.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Hahn ranks in Medicare procedure volume
- Spinal fusion
- 97th percentile338 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 88th percentile74 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. Michael R. Hahn II has 2 publications on record
Dmand AI links 2 papers to Dr. Hahn in 2020.
Papers2
Recent publications by Dr. Hahn
See who Dr. Hahn researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hahn works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Michael R. Hahn II received $275,719 in industry payments from 2016 to 2025
CMS Open Payments shows 89 general payments to Dr. Hahn from 16 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 98% of the total. One Surgical, Inc. paid the most, $265,316.
General payments to Dr. Hahn by program year, 2016 to 2025
General payments to Dr. Hahn by kind, 2016 to 2025
$275.7Kin total
- Consulting fees$270,82598%
- Food and beverage$3,7761%
- Travel and lodging$1,0440%
- Education$740%
Companies that paid Dr. Hahn 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. Michael R. Hahn II graduated from University of Oklahoma College of Medicine
Dr. Hahn graduated from University of Oklahoma College of Medicine in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael R. Hahn II'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Michael R. Hahn II
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. Michael R. Hahn II's NPI number?
Dr. Michael R. Hahn II's NPI number is 1891784237. It was assigned on October 18, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael R. Hahn II?
Dr. Michael R. Hahn II is a neurosurgeon in Oklahoma City, Oklahoma. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Michael R. Hahn II practice?
Dr. Hahn practices at 1000 North Lee Avenue, Oklahoma City, OK 73101. Dr. Hahn's primary practice is SSM Health St. Anthony Hospital - Oklahoma City in Oklahoma City, Oklahoma, part of SSM Health Care. Dmand AI also links Dr. Hahn to 3 hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group.
What is Dr. Michael R. Hahn II's office phone number?
The practice phone on file for Dr. Hahn is (405) 272-7000.
What is Dr. Michael R. Hahn II's medical license number?
Dr. Hahn holds Oklahoma license 18431.
Which hospitals is Dr. Michael R. Hahn II affiliated with?
Dr. Hahn practices at SSM Health St. Anthony Hospital - Oklahoma City in Oklahoma City, Oklahoma. Dr. Hahn is also affiliated with Memorial Health System of Southwest Oklahoma. Dmand AI links Dr. Hahn to 3 more hospitals.
What medical group is Dr. Michael R. Hahn II part of?
Dr. Hahn is linked to SSM Health Medical Group. Dmand AI links Dr. Hahn to 1 more medical group.
Does Dr. Michael R. Hahn II accept Medicare?
Yes. CMS data shows Dr. Hahn billed Medicare for 1,627 services in 2024, and Dr. Hahn accepts Medicare assignment.
What is Dr. Michael R. Hahn II's MIPS score?
Dr. Hahn's MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.
How many Medicare patients does Dr. Michael R. Hahn II see?
CMS counts 657 Medicare patients who saw Dr. Hahn in 2024, with an average age of 73.
Show 6 more questionsShow fewer questions
What services does Dr. Michael R. Hahn II bill to Medicare?
In 2024, Dr. Hahn's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and office visit, new patient (99204).
Where did Dr. Michael R. Hahn II go to medical school?
Dr. Hahn graduated from University of Oklahoma College of Medicine in 1992.
What drugs does Dr. Michael R. Hahn II prescribe most?
In 2024 Medicare Part D data, Dr. Hahn's most prescribed drugs by claims were Cyclobenzaprine HCl, Hydrocodone-Acetaminophen and Oxycodone-Acetaminophen.
Has Dr. Michael R. Hahn II received payments from drug or device companies?
CMS Open Payments shows $275,719 in general payments to Dr. Hahn from 16 companies from 2016 to 2025. The largest total came from One Surgical, Inc.
How long has Dr. Michael R. Hahn II been practicing?
Dr. Hahn graduated from medical school in 1992, 34 years ago.
Does Dr. Michael R. Hahn II do research?
Dmand AI links 2 publications to Dr. Hahn.
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