Dr. Gregory A. Chambers, MD
- Medicare services, 2024
- 87
- Medicare patients, 2026
- 94
- Part D claims, 2026
- 15
- Hospital affiliations
- 2
- Industry payments
- $50,821
- Practice address
- 231 W Vernon Ave Ste 202, Los Angeles, CA 90037-2779
- Practice phone
- Call (323) 238-7192
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gregory A Chambers, MD A Medical Corporation
Physician office · Los Angeles, California
Find Dr. Chambers' 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 A. Chambers is a general surgeon in Los Angeles, California
Dr. Chambers practices at Gregory A Chambers, MD A Medical Corporation in Los Angeles, California.
Dr. Chambers' NPI, 1972546406, was assigned on June 13, 2006. Dr. Chambers graduated from University of Kansas School of Medicine - Kansas City in 1995. Dr. Chambers' California license number on file is A62663.
- NPI
- 1972546406NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345292595
- NPI enumeration date
- June 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (323) 238-7192
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory A. Chambers practices at Gregory A Chambers, MD A Medical Corporation in Los Angeles, California
Dr. Chambers' primary practice is Gregory A Chambers, MD A Medical Corporation, at 231 W Vernon Ave Ste 202, Los Angeles, CA 90037-2779. The practice phone is (323) 238-7192.
- Gregory A Chambers, MD A Medical Corporation231 W Vernon Ave Ste 202, Los Angeles, CA 90037-2779Phone(323) 238-7192
Source: Dmand AI Affiliation Data
Dr. Gregory A. Chambers is affiliated with 3 sites of care and 1 medical group
Dr. Chambers' primary practice is Gregory A Chambers, MD A Medical Corporation in Los Angeles, California. Dr. Chambers is also affiliated with Long Beach Medical Center. The medical group on file is Acute Care Surgery Medical Group. Dmand AI also links Dr. Chambers to 1 more hospital, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory A. Chambers' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chambers practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gregory A Chambers, MD A Medical Corporation | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory A. Chambers is one of 2,926 general surgeons in California
Surgery is Dr. Chambers' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Chambers is board certified in surgery by the American Board of Surgery. Dr. Chambers has a license on file in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists colon removal, esophagus, stomach, or upper small intestine surgery, gallbladder removal and groin hernia surgery among the conditions Dr. Chambers treats.
General surgeons near Dr. Chambers
Counts of general surgeons 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 A. Chambers billed Medicare for 87 services in 2024
CMS data shows 87 Medicare services from Dr. Chambers across 3 procedure codes in 2024, for 94 Medicare patients. Medicare paid $6,722 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chambers' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 722024: 8721%
Dr. Chambers compared with the California median for general surgeons, 2024
- Dr. Chambers
- California median
- Medicare services
- 87vs 16648% below
- Medicare patients
- 94vs 12122% below
- Part D claims
- 51vs 3450% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Chambers' 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. Chambers?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chambers and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Chambers treated 94 Medicare patients in 2026, average age 71
CMS counts 94 Medicare patients who saw Dr. Chambers in 2026. The largest group is 65 to 74, with 39 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 65% are also on Medicaid. Their average risk score is 2.61, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Chambers' median patient age at 53, with 62% women.
Dr. Chambers' Medicare patients by age, 2026
CMS leaves out age groups with fewer than 11 patients.
Dr. Chambers' Medicare patients by sex, 2026
- Women4851%
- Men4649%
Chronic conditions among Dr. Chambers' Medicare patients, 2026
- High blood pressure75%
- High cholesterol75%
- Diabetes65%
- Heart failure45%
- Mood disorders45%
- Chronic kidney disease41%
- Depression41%
- Arthritis40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chambers' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women62%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. Gregory A. Chambers wrote 15 Medicare Part D claims in 2026
In 2026, Dr. Chambers wrote 15 Medicare Part D claims. 100% of them were for generic drugs. They cover 2 drugs, with $311 in total drug cost. In 2016, CMS named 47 claims across 2 drugs.
Dr. Chambers' most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 472017: 519%
Drugs named by CMS: 2 in 2017, 2 in 2016.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2026 data
How Dr. Gregory A. Chambers takes part in Medicare
Dr. Chambers accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 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 A. Chambers received $50,821 in industry payments from 2016 to 2025
CMS Open Payments shows 179 general payments to Dr. Chambers from 22 drug and device companies from 2016 to 2025. Education make up the largest share, 61% of the total. Intuitive Surgical, Inc. paid the most, $36,806.
General payments to Dr. Chambers by program year, 2016 to 2025
General payments to Dr. Chambers by kind, 2016 to 2025
- Education$31,00061%
- Travel and lodging$10,09820%
- Food and beverage$9,71019%
- Gifts$140%
Companies that paid Dr. Chambers 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 A. Chambers has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chambers.
Awards and honors for Dr. Chambers
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Gregory A. Chambers graduated from University of Kansas School of Medicine - Kansas City
Dr. Chambers graduated from University of Kansas School of Medicine - Kansas City in 1995. Dr. Chambers is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Gregory A. Chambers accepts plans from 13 insurance carriers
Dr. Chambers is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Humana
- LA Care
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- +5 more carriersWith a free account
Plan types Dr. Chambers accepts, by number of carriers
- Medicare10
- PPO8
- HMO6
- POS4
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory A. Chambers'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 A. Chambers
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 A. Chambers' NPI number?
Dr. Gregory A. Chambers' NPI number is 1972546406. It was assigned on June 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory A. Chambers?
Dr. Gregory A. Chambers is a general surgeon in Los Angeles, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Gregory A. Chambers practice?
Dr. Chambers practices at 231 W Vernon Ave Ste 202, Los Angeles, CA 90037-2779. Dr. Chambers' primary practice is Gregory A Chambers, MD A Medical Corporation in Los Angeles, California. Dmand AI also links Dr. Chambers to 1 hospital, and a free account names each one.
What is Dr. Gregory A. Chambers' office phone number?
The practice phone on file for Dr. Chambers is (323) 238-7192. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. Gregory A. Chambers' email address?
Dmand AI checks professional and personal email addresses for Dr. Chambers through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Gregory A. Chambers' medical license number?
Dr. Chambers' California license number on file is A62663.
Which hospitals is Dr. Gregory A. Chambers affiliated with?
Dr. Chambers is affiliated with Long Beach Medical Center. Dmand AI links Dr. Chambers to 1 more hospital, named with a free account.
What medical group is Dr. Gregory A. Chambers part of?
Dr. Chambers is linked to Acute Care Surgery Medical Group.
Who does Dr. Gregory A. Chambers practice with?
Dmand AI links 131 HCPs to Dr. Chambers' primary medical group, 52 of them general surgeons. A free account lists them, with verified contacts.
Does Dr. Gregory A. Chambers accept Medicare?
Yes. CMS data shows Dr. Chambers billed Medicare for 87 services in 2024, and Dr. Chambers accepts Medicare assignment.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Gregory A. Chambers see?
CMS counts 94 Medicare patients who saw Dr. Chambers in 2026, with an average age of 71.
Is Dr. Gregory A. Chambers board certified?
Yes. Dr. Chambers is board certified in surgery by the American Board of Surgery.
What services does Dr. Gregory A. Chambers bill to Medicare?
In 2024, Dr. Chambers' most billed Medicare services were hospital inpatient care (99222), hospital inpatient care (99232) and hospital inpatient care (99231).
Where did Dr. Gregory A. Chambers go to medical school?
Dr. Chambers graduated from University of Kansas School of Medicine - Kansas City in 1995.
What drugs does Dr. Gregory A. Chambers prescribe most?
In 2017 Medicare Part D data, Dr. Chambers' most prescribed drugs by claims were Hydrocodone-Acetaminophen and Cephalexin.
Has Dr. Gregory A. Chambers received payments from drug or device companies?
CMS Open Payments shows $50,821 in general payments to Dr. Chambers from 22 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gregory A. Chambers been practicing?
Dr. Chambers graduated from medical school in 1995, 31 years ago.
What EHR does Dr. Gregory A. Chambers' practice use?
Dmand AI tracks the EHR system at Gregory A Chambers, MD A Medical Corporation and at 2 more affiliated sites. The vendor and product are available with a free Dmand AI account.
What insurance does Dr. Gregory A. Chambers accept?
Dr. Chambers is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 10. Check the plan with the practice before a visit. The full carrier list is available with a free Dmand AI account.
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