Dr. Gregory J. Hattan, MD
- Medicare services, 2022
- 18
- Medicare patients, 2024
- 15
- Part D claims, 2024
- 43
- Hospital affiliations
- 1
- Industry payments
- $1,725
- Practice address
- 1600 South 48th St, Lincoln, NE 68506
- Practice phone
- Call (402) 481-1111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hattan's professional email, personal email and mobile number
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Dr. Gregory J. Hattan is an OB-GYN in Lincoln, Nebraska
Dr. Hattan practices at Bryan Medical Center in Lincoln, Nebraska, part of Bryan Health.
Dr. Hattan's NPI, 1396854204, was assigned on August 30, 2006. Dr. Hattan graduated from University of Nebraska College of Medicine in 1991. Dr. Hattan holds Nebraska license 18886.
- NPI
- 1396854204NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668368929
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (402) 481-1111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory J. Hattan practices at Bryan Medical Center in Lincoln, Nebraska
Dr. Hattan's primary practice is Bryan Medical Center, at 1600 South 48th St, Lincoln, NE 68506 in Lancaster County. The practice phone is (402) 481-1111.
- Bryan Medical Center1600 South 48th St, Lincoln, NE 68506 · Lancaster CountyPhone(402) 481-1111
Source: Dmand AI Affiliation Data
Dr. Gregory J. Hattan is affiliated with 1 site of care and 1 medical group
Dr. Hattan's primary practice is Bryan Medical Center in Lincoln, Nebraska, part of Bryan Health. The medical group on file is Bryan Orthopedic Trauma.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory J. Hattan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hattan practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bryan Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Bryan Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gregory J. Hattan is one of 229 OB-GYNs in Nebraska
Obstetrics and gynecology is Dr. Hattan's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Hattan is licensed in Nebraska.
Specialties and state licenses
- Obstetrics and gynecology, NebraskaPrimary
OB-GYNs near Dr. Hattan
Counts of OB-GYNs 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. Gregory J. Hattan billed Medicare for 18 services in 2022
CMS data shows 18 Medicare services from Dr. Hattan across 1 procedure code in 2022, all of them office visits, for 15 Medicare patients. Medicare paid $877 for them. Every service was in an office.
Dr. Hattan's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 202022: 1810%
- Other services
- 2021: 112022: 0100%
Dr. Hattan compared with the Nebraska median for OB-GYNs, 2022
- Dr. Hattan
- Nebraska median
- Medicare services
- 18vs 5668% below
- Medicare patients
- 15vs 3962% below
- Part D claims
- 22vs 2924% below
Medians across 209 OB-GYNs in Nebraska with Dmand AI profiles that report each measure.
Dr. Hattan's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hattan and other OB-GYNs in Nebraska.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory J. Hattan treated 15 Medicare patients in 2024, average age 72
CMS counts 15 Medicare patients who saw Dr. Hattan in 2024. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hattan's median patient age at 32, with 99% women.
Dr. Hattan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 32
Patient panel by sex, all payers
- Women99%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory J. Hattan wrote 43 Medicare Part D claims in 2024
In 2024, Dr. Hattan wrote 43 Medicare Part D claims. 93% of them were for generic drugs. CMS names the drug for 22 of them, across 1 drug with 11 or more claims each, at $718 in total drug cost. In 2023, CMS named 30 claims across 1 drug.
Dr. Hattan's Part D claims by kind of drug, 2024
- Generic40 claims93%
- Brand-name and other3 claims7%
Dr. Hattan'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 302024: 2227%
Drugs named by CMS: 1 in 2024, 1 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
How Dr. Gregory J. Hattan takes part in Medicare
Dr. Hattan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of the uterus: 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. Gregory J. Hattan received $1,725 in industry payments from 2016 to 2025
CMS Open Payments shows 86 general payments to Dr. Hattan from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Astellas Pharma US Inc paid the most, $444.
General payments to Dr. Hattan by program year, 2016 to 2025
Companies that paid Dr. Hattan 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. Gregory J. Hattan graduated from University of Nebraska College of Medicine
Dr. Hattan graduated from University of Nebraska College of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory J. Hattan'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) |
| 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. Gregory J. Hattan
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. Gregory J. Hattan's NPI number?
Dr. Gregory J. Hattan's NPI number is 1396854204. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory J. Hattan?
Dr. Gregory J. Hattan is an OB-GYN in Lincoln, Nebraska. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Gregory J. Hattan practice?
Dr. Hattan practices at 1600 South 48th St, Lincoln, NE 68506. Dr. Hattan's primary practice is Bryan Medical Center in Lincoln, Nebraska, part of Bryan Health.
What is Dr. Gregory J. Hattan's office phone number?
The practice phone on file for Dr. Hattan is (402) 481-1111.
What is Dr. Gregory J. Hattan's medical license number?
Dr. Hattan holds Nebraska license 18886.
Which hospitals is Dr. Gregory J. Hattan affiliated with?
Dr. Hattan practices at Bryan Medical Center in Lincoln, Nebraska.
What medical group is Dr. Gregory J. Hattan part of?
Dr. Hattan is linked to Bryan Orthopedic Trauma.
Does Dr. Gregory J. Hattan accept Medicare?
Yes. CMS data shows Dr. Hattan billed Medicare for 18 services in 2022, and Dr. Hattan accepts Medicare assignment.
How many Medicare patients does Dr. Gregory J. Hattan see?
CMS counts 15 Medicare patients who saw Dr. Hattan in 2024, with an average age of 72.
What services does Dr. Gregory J. Hattan bill to Medicare?
In 2022, Dr. Hattan's most billed Medicare services were office visit, new patient (99202).
Show 4 more questionsShow fewer questions
Where did Dr. Gregory J. Hattan go to medical school?
Dr. Hattan graduated from University of Nebraska College of Medicine in 1991.
What drugs does Dr. Gregory J. Hattan prescribe most?
In 2024 Medicare Part D data, Dr. Hattan's most prescribed drugs by claims were Estradiol.
Has Dr. Gregory J. Hattan received payments from drug or device companies?
CMS Open Payments shows $1,725 in general payments to Dr. Hattan from 28 companies from 2016 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Dr. Gregory J. Hattan been practicing?
Dr. Hattan graduated from medical school in 1991, 35 years ago.
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