Charles C. Koo, MD
Hematology (Pathology) Physician · Los Angeles, CA
Charles C. Koo, MD is a hematology (pathology) physician with a practice address in Los Angeles, California, and NPI 1609947597, issued on Nov 13, 2006. Check the license (California A36623, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Charles C. Koo
- Credential
- MD
- Primary taxonomy
- Hematology (Pathology) Physician 207ZH0000X
- License number
- A36623 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4733 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (323) 783-4011
- Enumerated
- Nov 13, 2006
- Record last updated
- Jan 22, 2009 (not updated in 17 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest hematology (pathology) physician records → All 65 in California → Look up another NPI →
Also registered at 4733 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Antoine Abcar, MDNephrology Physician1245301159
- Iman Abdalla, MDHematology & Oncology Physician1730248311
- Joseph Abu-Dalu, MDVascular Surgery Physician1821157587
- Isaac Abusleme, M.D.Internal Medicine Physician1891109468
- Nancy Adachi, PTPhysical Therapist1902004245
- Sangeeta Aggarwal, MDInternal Medicine Physician1578655908
Verify Charles C. Koo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A36623Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $46.93
1 payment: food and beverage; the largest payer was Abiomed. The 72 providers of this specialty with any payment received $4,540.82 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Charles C. Koo among 65 hematology (pathology) physician records in California
Charles C. Koo, MD is one of 65 hematology (pathology) physician records with a practice address in California. 52% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 66% newer
- In a Medicare fileYes · 52% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2009 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZH0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Pathology) Physician providers in California
There are 65 hematology (pathology) physician records in California.
All 65 in California → Every provider in Los Angeles → Hematology (Pathology) Physician nationwide →
The 8 hematology (pathology) physician records with the nearest ZIP codes
- Tse-Chang Cheng, MDLos Angeles, CA 900271851462733
- Aihong Liu, M.D., PH.D.Los Angeles, CA 900271568611549
- Hongbin Zha, MDLos Angeles, CA 900271841361821
- David Yau, MDLos Angeles, CA 900331528295946
- Adam Cloe, M.D.Los Angeles, CA 900421639519770
- Patrick Browne, M.D., PH.D.Los Angeles, CA 900661972798726
- Joon Lee, M.D.Los Angeles, CA 900661528255957
- Sassan Rostamipour Shiroyeh, M.D.Los Angeles, CA 900661336391473
Common questions
What is Charles C. Koo, MD's NPI number?
Charles C. Koo, MD's National Provider Identifier (NPI) is 1609947597, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles C. Koo, MD located?
The NPPES record lists a practice address at 4733 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (323) 783-4011. Providers update this record themselves, so call before visiting.
How can I verify Charles C. Koo, MD's license?
NPPES lists California license number A36623, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.