NPPES file of Aug 9, 2026

Tanzina Nasreen, M.D.

Nephrology Physician · Los Alamitos, CA

Tanzina Nasreen, M.D. is a nephrology physician with a practice address in Los Alamitos, California, and NPI 1649454638, issued on Dec 26, 2007. Check the license (California A92620, 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
1649454638
Name
Tanzina Nasreen
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
A92620 CA
Self-reported in NPPES; status is on the state search
Practice location
10941 Bloomfield St, Los Alamitos, CA 90720
Phone
(562) 596-1667
Enumerated
Dec 26, 2007
Record last updated
Aug 6, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(562) 598-6867
Medicare enrollment
Enrolled (PECOS I20081030000238); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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 10941 Bloomfield St

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

  1. Heena Contractor, M.D.Internal Medicine Physician1518954973
  2. Hossein Eftekhari, MDInternal Medicine Physician1265694962
  3. Kathleen Fulmer, ARNPFamily Nurse Practitioner1366519985
  4. Michael Lauermann, M.D.Specialist1265522684
  5. Aaron Richler, M.D.Internal Medicine Physician1619350337
  6. Jack Rubin, M.D.Internal Medicine Physician1700882479

Verify Tanzina Nasreen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A92620    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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3% more Medicare Part D claims than the average nephrology physician in 2024

1,515 Medicare Part D claims for 187 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. 18 claims were for opioids.

  1. Tanzina Nasreen1,515
  2. Specialty average1,465

Most prescribed

  1. Farxiga118 claims
  2. Sevelamer Carbonate93 claims
  3. Amlodipine Besylate81 claims
  4. Calcium Acetate75 claims
  5. Nifedipine Er70 claims
  6. Furosemide65 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: $94.60

1 payment: food and beverage; the largest payer was Travere Therapeutics, 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. Tanzina Nasreen$94.60
  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.

Bills Medicare through one group practice

  1. Southern California Kidney Consultants IncGarden Grove, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Tanzina Nasreen among 1,468 nephrology physician records in California

Tanzina Nasreen, 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 2007, is newer than 52% of them.

  • NPI issued2007 · 52% of these records are older, 35% newer
  • In a Medicare fileYes · 88% of these records are
  • In the CMS Doctors and Clinicians fileYes · 77% of these records are
  • Graduated1998 · median 2001 among the 1,128 with a school on file
  • Record last updated2008 · 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 Los Alamitos → Nephrology Physician nationwide →

The 8 nephrology physician records with the nearest ZIP codes

  1. Meenakshi Verma, M.DLos Alamitos, CA 907201942463427
  2. Ing Wong, MDLos Alamitos, CA 907201053408435
  3. George Hon, MDParamount, CA 907231699772350
  4. Mohammad Ismail, MDParamount, CA 907231730105784
  5. Richard Lee, MDParamount, CA 907231780761353
  6. Kyaw Moe, MDLakewood, CA 907121083649735
  7. Shaan Anand, MDHarbor City, CA 907101417016015
  8. Larry Chan, MDHarbor City, CA 907101689733297

Common questions

What is Tanzina Nasreen, M.D.'s NPI number?

Tanzina Nasreen, M.D.'s National Provider Identifier (NPI) is 1649454638, issued on Dec 26, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Tanzina Nasreen, M.D. located?

The NPPES record lists a practice address at 10941 Bloomfield St, Los Alamitos, CA, 90720. Phone: (562) 596-1667. Providers update this record themselves, so call before visiting.

How can I verify Tanzina Nasreen, M.D.'s license?

NPPES lists California license number A92620, 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 Tanzina Nasreen, M.D. prescribe under Medicare Part D?

In 2024, Tanzina Nasreen, M.D. had 1,515 Medicare Part D claims for 187 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.