Dr. Gregory R. Klis, MD
- Medicare services, 2024
- 545
- Medicare patients, 2024
- 271
- Part D claims, 2024
- 543
- Hospital affiliations
- 2
- Industry payments
- $9,145
- Practice address
- 8339 Brimhall Rd Ste 1303, Bakersfield, CA 93312-4088
- Practice phone
- Call (661) 829-0026
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
California Obstetrics & Gynecology Institute
Physician office · Bakersfield, California
Find Dr. Klis' 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. Gregory R. Klis is an OB-GYN in Bakersfield, California
Dr. Klis practices at California Obstetrics & Gynecology Institute in Bakersfield, California.
Dr. Klis' NPI, 1508844648, was assigned on January 9, 2006. Dr. Klis graduated from University Of Minnesota Medical School in 1992. Dr. Klis holds California license G83369.
- NPI
- 1508844648NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729002043
- NPI enumeration date
- January 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (661) 829-0026
- 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. Gregory R. Klis practices at California Obstetrics & Gynecology Institute in Bakersfield, California
Dr. Klis' primary practice is California Obstetrics & Gynecology Institute, at 8339 Brimhall Rd Ste 1303, Bakersfield, CA 93312-4088. The practice phone is (661) 829-0026.
- California Obstetrics & Gynecology Institute8339 Brimhall Rd Ste 1303, Bakersfield, CA 93312-4088Phone(661) 829-0026
Source: Dmand AI Affiliation Data
Dr. Gregory R. Klis is affiliated with 4 sites of care and 1 medical group
Dr. Klis' primary practice is California Obstetrics & Gynecology Institute in Bakersfield, California. Dr. Klis is also affiliated with Adventist Health Bakersfield. Dmand AI also links Dr. Klis to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory R. Klis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klis practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| California Obstetrics & Gynecology Institute | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory R. Klis is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Klis' primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dmand AI has Dr. Klis' licenses on file in 2 states: California and Michigan.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
- Michigan license
Clinical focus
Dmand AI lists bladder disease, hysterectomy, menopause, ovarian cyst, pelvic prolapse, UTI, vaginal infection and vaginal prolapse repair among the conditions Dr. Klis treats.
OB-GYNs near Dr. Klis
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 R. Klis billed Medicare for 545 services in 2024
CMS data shows 545 Medicare services from Dr. Klis across 9 procedure codes in 2024, for 271 Medicare patients. Medicare paid $34,960 for them. Every service was in an office.
Dr. Klis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 1152024: 255122%
- Office and hospital visits
- 2023: 2182024: 2389%
- Imaging
- 2023: 1962024: 4080%
- Surgery
- 2023: 182024: 1233%
- Lab and pathology
- 2023: 332024: 0100%
Dr. Klis compared with the California median for OB-GYNs, 2024
- Dr. Klis
- California median
- Medicare services
- 545vs 589.4 times
- Medicare patients
- 271vs 525.2 times
- Part D claims
- 429vs 3512.3 times
Medians across 3,823 OB-GYNs in California with Dmand AI profiles that report each measure.
Dr. Klis' 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. Klis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Klis and other OB-GYNs in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory R. Klis treated 271 Medicare patients in 2024, average age 71
CMS counts 271 Medicare patients who saw Dr. Klis in 2024. The largest group is 65 to 74, with 185 patients. 75% of them have high cholesterol, and 67% have high blood pressure. 10% are also on Medicaid. Their average risk score is 0.80, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Klis' median patient age at 40, with 99% women.
Dr. Klis' Medicare patients by age, 2024
Chronic conditions among Dr. Klis' Medicare patients, 2024
- High cholesterol75%
- High blood pressure67%
- Arthritis51%
- Anxiety25%
- Ischemic heart disease24%
- Diabetes22%
- Mood disorders22%
- Depression21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Klis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 40
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 R. Klis wrote 543 Medicare Part D claims in 2024
In 2024, Dr. Klis wrote 543 Medicare Part D claims for 179 patients. 94% of them were for generic drugs. CMS names the drug for 429 of them, across 11 drugs with 11 or more claims each, at $12,426 in total drug cost. In 2023, CMS named 449 claims across 13 drugs.
Dr. Klis' Part D claims by kind of drug, 2024
- Generic508 claims94%
- Brand-name35 claims6%
Dr. Klis' 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. Klis' Part D claims, 2024
- Opioids4%22 of 543 claims
- Antibiotics11%60 of 543 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: 4492024: 4294%
Drugs named by CMS: 11 in 2024, 13 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 R. Klis takes part in Medicare
Dr. Klis accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal of the uterus: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 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 R. Klis received $9,145 in industry payments from 2016 to 2025
CMS Open Payments shows 266 general payments to Dr. Klis from 41 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 55% of the total. Allergan Inc. paid the most, $5,226.
General payments to Dr. Klis by program year, 2016 to 2025
General payments to Dr. Klis by kind, 2016 to 2025
- Speaker and faculty fees$5,02455%
- Food and beverage$3,95143%
- Gifts$1111%
- Education$591%
Companies that paid Dr. Klis 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 R. Klis has 1 award and honors on record
Dmand AI lists 1 award for Dr. Klis.
Awards and honors for Dr. Klis
- Undated
- Compassionate Doctors
Source: Dmand AI Professional Profile Data
Dr. Gregory R. Klis graduated from University Of Minnesota Medical School
Dr. Klis graduated from University Of Minnesota Medical School in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Gregory R. Klis accepts plans from 11 insurance carriers
Dr. Klis is in network with 11 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Alliant Health Plans
- +3 more carriersWith a free account
Plan types Dr. Klis accepts, by number of carriers
- Medicare8
- PPO8
- HMO5
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory R. Klis'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 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. Gregory R. Klis
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 R. Klis' NPI number?
Dr. Gregory R. Klis' NPI number is 1508844648. It was assigned on January 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory R. Klis?
Dr. Gregory R. Klis is an OB-GYN in Bakersfield, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Gregory R. Klis practice?
Dr. Klis practices at 8339 Brimhall Rd Ste 1303, Bakersfield, CA 93312-4088. Dr. Klis' primary practice is California Obstetrics & Gynecology Institute in Bakersfield, California. Dmand AI also links Dr. Klis to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Gregory R. Klis' office phone number?
The practice phone on file for Dr. Klis is (661) 829-0026.
What is Dr. Gregory R. Klis' medical license number?
Dr. Klis holds California license G83369, one of the licenses on file in 2 states.
Which states has Dr. Gregory R. Klis been licensed in?
Dmand AI has state licenses on file for Dr. Klis in California (1996 to 2026) and Michigan (1992 to 1996).
Which hospitals is Dr. Gregory R. Klis affiliated with?
Dr. Klis is affiliated with Adventist Health Bakersfield. Dmand AI links Dr. Klis to 1 more hospital.
Does Dr. Gregory R. Klis accept Medicare?
Yes. CMS data shows Dr. Klis billed Medicare for 545 services in 2024, and Dr. Klis accepts Medicare assignment.
How many Medicare patients does Dr. Gregory R. Klis see?
CMS counts 271 Medicare patients who saw Dr. Klis in 2024, with an average age of 71.
What services does Dr. Gregory R. Klis bill to Medicare?
In 2024, Dr. Klis' most billed Medicare services were office visit, established patient (99213), medicare temporary code (Q0091) and medicare service (G0101).
Show 5 more questionsShow fewer questions
Where did Dr. Gregory R. Klis go to medical school?
Dr. Klis graduated from University Of Minnesota Medical School in 1992.
What drugs does Dr. Gregory R. Klis prescribe most?
In 2024 Medicare Part D data, Dr. Klis' most prescribed drugs by claims were Estradiol, Progesterone and Oxybutynin Chloride ER.
Has Dr. Gregory R. Klis received payments from drug or device companies?
CMS Open Payments shows $9,145 in general payments to Dr. Klis from 41 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. Gregory R. Klis been practicing?
Dr. Klis graduated from medical school in 1992, 34 years ago.
What insurance does Dr. Gregory R. Klis accept?
Dr. Klis is in network with 11 carriers, including Aetna, Elevance and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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