Active NPI 1972546406 Individual Practitioner Male Practitioner

Dr. Gregory A Chambers , MD

Surgery • Los Angeles, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Gregory Chambers, MD is a certified Surgery practicing in Los Angeles, CA. With approximately 31 years of clinical experience since graduating from University Of Kansas School Of Med (Kc/Wich/Sal) in 1995, Dr. Chambers delivers high-quality medical care to the local community at 231 W VERNON AVE STE 202.

Dr. Chambers is affiliated with Acute Care Surgery Medical Group Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include initial hospital care with straightforward or low-level medical decision making, if using time, at least, subsequent hospital care with moderate levelof medical decision making, if using time, at least, follow-up hospital inpatient care per day. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

231 W Vernon Ave Ste 202

Los Angeles, CA 900372779

Telephone 3232387192

Fax 3234322035

Associated Practice Facility / Clinic

🏢 Gregory Chambers M D A Medical Corporation Facility NPI 1366643918

Medicare Profile & Education

Medical School

University Of Kansas School Of Med (Kc/wich/sal)

Graduation Year

1995

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Surgery in Los Angeles, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

31 Yrs +9.7 yrs vs City Avg

City Avg: 21.3 Yrs

State Avg: 27.4 Yrs

Regional Practice Density

285 Specialists

Practicing in Los Angeles, CA (3346 Statewide)

Telehealth Adoption Rate

13.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

76.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Chambers (31 Years) 31 Yrs

Los Angeles Specialty Average (21.3 Years) 21.3 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	35	35	$579.00	$134.75
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	35	33	$351.00	$81.54
99231 Follow-up hospital inpatient care per day, typically 15 minutes	17	17	$218.00	$50.98

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	38	31	$357.29	$83.21
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	23	22	$586.35	$136.61
99231 Follow-up hospital inpatient care per day, typically 15 minutes	11	11	$222.00	$51.88

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	47	29	$309.13	$75.28
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	13	13	$559.85	$143.01

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	37	33	$306.35	$76.84
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	19	19	$457.37	$145.27

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	53	39	$310.91	$78.35
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	18	18	$379.06	$148.44

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99291 Critical care, first 30-74 minutes	45	45	$479.07	$234.88
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	36	26	$137.58	$77.51
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	29	29	$350.55	$215.47
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	13	13	$282.15	$145.92
99239 Hospital discharge day management, more than 30 minutes	11	11	$175.00	$115.31

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	47	31	$119.26	$77.74
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	23	$220.00	$145.97
99291 Critical care, first 30-74 minutes	18	18	$450.00	$235.69
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	15	12	$170.00	$111.37
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	15	15	$330.00	$216.45
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$274.09	$179.59

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	38	26	$168.16	$111.35
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	31	24	$115.00	$77.14
99291 Critical care, first 30-74 minutes	28	26	$420.00	$236.55
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	24	24	$220.00	$145.79
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	19	19	$270.00	$178.27
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	16	16	$327.19	$216.16

Medical Specialties & State Licenses

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

State License CA A62663

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00A626630 (CA)

Hospital & Practice Group Affiliations

Acute Care Surgery Medical Group Inc

215 W Janss Rd, Thousand Oaks, CA 913601847

Phone: 8054972727

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

11 Historical Events

✅

NPI Profile Active November 01, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location November 01, 2017

Registered at 231 W VERNON AVE STE 202, LOS ANGELES, CA 900372779 (Tel: 3232387192)

📍

Updated Business Mailing Address November 01, 2017

Registered at PO BOX 91569, LONG BEACH, CA 908091569 (Tel: 5624914879)

👤

Provider Name / Credentials Updated November 01, 2017

Recorded as GREGORY CHAMBERS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 01, 2017

Surgery (License #A62663 in CA)

✅

NPI Profile Active January 18, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location January 18, 2008

Registered at 1045 ATLANTIC AVE, SUITE 712, LONG BEACH, CA 908133408 (Tel: 5624914879)

📍

Updated Business Mailing Address January 18, 2008

Registered at PO BOX 91569, LONG BEACH, CA 908091569 (Tel: 5624914879)

👤

Provider Name / Credentials Updated January 18, 2008

Recorded as GREGORY CHAMBERS, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 18, 2008

Surgery (License #A62663 in CA)

🟢

Initial NPI Registration & Enumeration June 13, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1972546406

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: June 13, 2006

Last Update: November 01, 2017

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

Po Box 91569

Long Beach, CA 908091569

Phone: 5624914879

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.