Natalia C. Llarena, MD
Reproductive Endocrinology Physician · Pasadena, CA
Natalia C. Llarena, MD is a reproductive endocrinology physician with a practice address in Pasadena, California, and NPI 1083005300, issued on Feb 9, 2015. Check the license (California A177111, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Natalia C. Llarena
- Credential
- MD
- Primary taxonomy
- Reproductive Endocrinology Physician 207VE0102X
- License number
- A177111 CA
Self-reported in NPPES; status is on the state search - Practice location
- 55 S Lake Ave FL 9, Pasadena, CA 91101
- Phone
- (818) 212-7541
- Enumerated
- Feb 9, 2015
- Record last updated
- May 27, 2025
- Entity
- Type 1 · individual
8 nearest reproductive endocrinology physician records → All 267 in California → Look up another NPI →
Also registered at 55 S Lake Ave FL 9
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Paulson, MDReproductive Endocrinology Physician1851442792
Verify Natalia C. Llarena in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A177111Check 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: $187.34
9 payments; by number, the most common kind was food and beverage; the largest payer was Ferring Pharmaceuticals Inc. The 1,066 providers of this specialty with any payment received $1,086.52 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.
Natalia C. Llarena among 267 reproductive endocrinology physician records in California
Natalia C. Llarena, MD is one of 267 reproductive endocrinology physician records with a practice address in California. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 86% of them.
- NPI issued2015 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileNo · 10% of these records are
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VE0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Reproductive Endocrinology Physician providers in California
There are 267 reproductive endocrinology physician records in California.
All 267 in California → Every provider in Pasadena → Reproductive Endocrinology Physician nationwide →
The 8 reproductive endocrinology physician records with the nearest ZIP codes
- Richard Paulson, MDPasadena, CA 911011851442792
- Aykut Bayrak, MDPasadena, CA 911051679586218
- Bradford Kolb, M.D.Pasadena, CA 911051407826423
- Jeffrey Nelson, D.O.Pasadena, CA 911051124099783
- John Wilcox, M.D.Pasadena, CA 911051023088689
- Eileen Chen, MDArcadia, CA 910071568522738
- Roselyn Dinsay, MDGlendale, CA 912031861464612
- Rodolfo Quintero, M.D.Glendale, CA 912051053416958
Common questions
What is Natalia C. Llarena, MD's NPI number?
Natalia C. Llarena, MD's National Provider Identifier (NPI) is 1083005300, issued on Feb 9, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Natalia C. Llarena, MD located?
The NPPES record lists a practice address at 55 S Lake Ave FL 9, Pasadena, CA, 91101. Phone: (818) 212-7541. Providers update this record themselves, so call before visiting.
How can I verify Natalia C. Llarena, MD's license?
NPPES lists California license number A177111, 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.