Tracy Ann Siegfried, M.D.
Internal Medicine Physician · Laguna Hills, CA
Tracy Ann Siegfried, M.D. is an internal medicine physician with a practice address in Laguna Hills, California, and NPI 1366598591, issued on Jan 29, 2007. Check the license (California A62919, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tracy Ann Siegfried
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A62919 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24331 EL Toro RD Ste 330, Laguna Hills, CA 92637
- Phone
- (949) 716-0833
- Enumerated
- Jan 29, 2007
- Record last updated
- Jul 10, 2026
- Fax
- (949) 716-0830
- Medicare enrollment
- Enrolled (PECOS I20040916000701); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Tracy Ann Siegfried in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A62919Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
7,106 Medicare Part D claims for 681 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 76 claims were for opioids.
Most prescribed
- Atorvastatin Calcium534 claims
- Levothyroxine Sodium483 claims
- Amlodipine Besylate395 claims
- Losartan Potassium321 claims
- Rosuvastatin Calcium243 claims
- Lisinopril235 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.
The MIPS final score for 2023 (Medicare payment program): 79 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Healthcare Partners Affiliates Medical GroupLaguna Woods, CA
- Saddleback Medical Group IncLaguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tracy Ann Siegfried among 17,696 internal medicine physician records in California
Tracy Ann Siegfried, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 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 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
56 internal medicine physician records list a practice address in Laguna Hills
They are 56 of the 2,069 NPPES records with a practice address in Laguna Hills, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Laguna Hills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kien-An Duong, MDLaguna Woods, CA 926371033175658
- Susan Grenz, MDLaguna Woods, CA 926371013989870
- James Lee, M.D.Laguna Woods, CA 926371891853107
- Sahar Lashin, M.D.Lake Forest, CA 926301598053894
- Madineth Muy, M.D.Lake Forest, CA 926301992807721
- Suma Oommen, M.D.Lake Forest, CA 926301063431203
- Nicole Sandler, NPLake Forest, CA 926301346933165
- Usha Idnani, M.D.Dana Point, CA 926291861446056
Common questions
What is Tracy Ann Siegfried, M.D.'s NPI number?
Tracy Ann Siegfried, M.D.'s National Provider Identifier (NPI) is 1366598591, issued on Jan 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tracy Ann Siegfried, M.D. located?
The NPPES record lists a practice address at 24331 EL Toro RD Ste 330, Laguna Hills, CA, 92637. Phone: (949) 716-0833. Providers update this record themselves, so call before visiting.
How can I verify Tracy Ann Siegfried, M.D.'s license?
NPPES lists California license number A62919, 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 Tracy Ann Siegfried, M.D. prescribe under Medicare Part D?
In 2024, Tracy Ann Siegfried, M.D. had 7,106 Medicare Part D claims for 681 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Tracy Ann Siegfried, M.D.'s MIPS final score?
The 2023 MIPS final score is 79 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.