NPPES file of Aug 9, 2026

Hong Sik Kim, M.D.

Nephrology Physician · Garden Grove, CA

Hong Sik Kim, M.D. is a nephrology physician with a practice address in Garden Grove, California, and NPI 1396727764, issued on Nov 18, 2005. Check the license (California A45579, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1396727764
Name
Hong Sik Kim
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
A45579 CA
Self-reported in NPPES; status is on the state search
Practice location
12665 Garden Grove Blvd, Garden Grove, CA 92843
Phone
(714) 530-3740
Enumerated
Nov 18, 2005
Record last updated
Nov 7, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(714) 530-0582
Medicaid ID
00A455792 CA
Medicare enrollment
Enrolled (PECOS I20100624000289); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →

Also registered at 12665 Garden Grove Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mumtaz Ali, M.DSpecialist1700849049
  2. James Boyce, M.D.Ophthalmology Physician1457351652
  3. Allen Chou, MDGeriatric Medicine (Internal Medicine) Physician1215919915
  4. Douglas Clark, M.D.Internal Medicine Physician1780688572
  5. Naveen Dhar, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1871604116
  6. Usha Dhar, M.D.Family Medicine Physician1699886846

Verify Hong Sik Kim in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A45579    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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24.5 times the Medicare Part D claims of the average nephrology physician in 2024

35,873 Medicare Part D claims for 1,518 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims. 34 claims were for opioids.

  1. Hong Kim35,873
  2. Specialty average1,465

Most prescribed

  1. Amlodipine Besylate2,565 claims
  2. Rosuvastatin Calcium2,266 claims
  3. Losartan Potassium1,820 claims
  4. Atorvastatin Calcium1,494 claims
  5. Vascepa1,004 claims
  6. Tamsulosin Hcl835 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $2,302.81

113 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Hong Kim$2,302.81
  2. Specialty average$3,091.37

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Hong Sik Kim among 1,468 nephrology physician records in California

Hong Sik Kim, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 90% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 77% of these records are
  • Graduated1983 · median 2001 among the 1,128 with a school on file
  • Record last updated2013 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Nephrology Physician providers in California

There are 1,468 nephrology physician records in California.

All 1,468 in California → Every provider in Garden Grove → Nephrology Physician nationwide →

The 8 nephrology physician records with the nearest ZIP codes

  1. Steve Bui, MDGarden Grove, CA 928431154390425
  2. An Dang, M.D.Garden Grove, CA 928431952302564
  3. Ramani Nathan, MDGarden Grove, CA 928431487623724
  4. Russell Ness, MDGarden Grove, CA 928431770552978
  5. Mital Patel, MDGarden Grove, CA 928431609223361
  6. Samir Patel, MDGarden Grove, CA 928431427519552
  7. Sridhar Reddy, M.D.Garden Grove, CA 928431780835447
  8. Peter Sohn, M.D.Garden Grove, CA 928431225579675

Common questions

What is Hong Sik Kim, M.D.'s NPI number?

Hong Sik Kim, M.D.'s National Provider Identifier (NPI) is 1396727764, issued on Nov 18, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Hong Sik Kim, M.D. located?

The NPPES record lists a practice address at 12665 Garden Grove Blvd, Garden Grove, CA, 92843. Phone: (714) 530-3740. Providers update this record themselves, so call before visiting.

How can I verify Hong Sik Kim, M.D.'s license?

NPPES lists California license number A45579, 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.

How much does Hong Sik Kim, M.D. prescribe under Medicare Part D?

In 2024, Hong Sik Kim, M.D. had 35,873 Medicare Part D claims for 1,518 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.