Catherine Kiley Monahan, NURSE PRACTITIONER
Endocrinology, Diabetes & Metabolism Physician · El Segundo, CA
Catherine Kiley Monahan, NURSE PRACTITIONER is an endocrinology, diabetes & metabolism physician with a practice address in El Segundo, California, and NPI 1962847400, issued on May 9, 2013. Check the license (California 12247, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Kiley Monahan
- Credential
- NURSE PRACTITIONER
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 12247 CA
APN.1001196-NP CO
Self-reported in NPPES; status is on the state search - Practice location
- 2101 Rosecrans Ave # 3230, El Segundo, CA 90245
- Phone
- (323) 628-8671
- Enumerated
- May 9, 2013
- Record last updated
- Oct 9, 2025
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 2101 Rosecrans Ave # 3230
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine Kiley Monahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 12247Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
18 Medicare Part D claims, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
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: $14.68
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. The 5,661 providers of this specialty with any payment received $5,742.15 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.
Catherine Kiley Monahan among 1,131 endocrinology, diabetes & metabolism physician records in California
Catherine Kiley Monahan, NURSE PRACTITIONER is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 77% of them.
- NPI issued2013 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in El Segundo → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Elisa Hsia, MDDowney, CA 902421073711701
- Karen Le, M.D.Downey, CA 902421427340645
- David Berger, MDDowney, CA 902411881683944
- Christine Kha, DODowney, CA 902411851784763
- Xin Chen, M.D.Hawthorne, CA 902501033573241
- Charles Holzner, M.D.Downey, CA 902401861439465
- Neil Goldberg, M.D.Culver City, CA 902321780722181
- Sylvia Shaw, MDLynwood, CA 902621093726663
Common questions
What is Catherine Kiley Monahan, NURSE PRACTITIONER's NPI number?
Catherine Kiley Monahan, NURSE PRACTITIONER's National Provider Identifier (NPI) is 1962847400, issued on May 9, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Kiley Monahan, NURSE PRACTITIONER located?
The NPPES record lists a practice address at 2101 Rosecrans Ave # 3230, El Segundo, CA, 90245. Phone: (323) 628-8671. Providers update this record themselves, so call before visiting.
How can I verify Catherine Kiley Monahan, NURSE PRACTITIONER's license?
NPPES lists California license number 12247, 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 Catherine Kiley Monahan, NURSE PRACTITIONER prescribe under Medicare Part D?
In 2024, Catherine Kiley Monahan, NURSE PRACTITIONER had 18 Medicare Part D claims; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.
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.