Sonja Stumme Krafcik, MD
Internal Medicine Physician · Laguna Niguel, CA
Sonja Stumme Krafcik, MD is an internal medicine physician with a practice address in Laguna Niguel, California, and NPI 1598767170, issued on Aug 12, 2005. Check the license (California C51621, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sonja Stumme Krafcik
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C51621 CA
Self-reported in NPPES; status is on the state search - Practice location
- 25500 Rancho Niguel RD, Laguna Niguel, CA 92677
- Phone
- (949) 831-3686
- Enumerated
- Aug 12, 2005
- Record last updated
- Jul 9, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (949) 831-3651
- Medicare enrollment
- Enrolled (PECOS I20041129000906); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 25500 Rancho Niguel RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Fiona Anderson, NP-CFamily Nurse Practitioner1831487958
- Sarah Belderes, DDSDentist1073767828
- Terri Cho, PAPhysician Assistant1174642524
- Norman Coakley, D.O.Family Medicine Physician1801912274
- Christopher Davis, D.O.Family Medicine Physician1356637813
- Sahar Doostzadeh, D.M.DPediatric Dentistry1447694260
Verify Sonja Stumme Krafcik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C51621Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average internal medicine physician in 2024
9,823 Medicare Part D claims for 614 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 150 claims were for opioids.
Most prescribed
- Amlodipine Besylate537 claims
- Levothyroxine Sodium490 claims
- Atorvastatin Calcium445 claims
- Losartan Potassium321 claims
- Rosuvastatin Calcium297 claims
- Metoprolol Succinate274 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.
Sonja Stumme Krafcik among 17,696 internal medicine physician records in California
Sonja Stumme Krafcik, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1990 · median 2004 among the 11,065 with a school on file
- Record last updated2014 · 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).
8 internal medicine physician records list a practice address in Laguna Niguel
They are 8 of the 885 NPPES records with a practice address in Laguna Niguel, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Laguna Niguel → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Bassam Bilal, M.D.Laguna Niguel, CA 926771306890827
- Susan Dindot, MDLaguna Niguel, CA 926771821279225
- Vincent Duda, MDLaguna Niguel, CA 926771104883610
- Peter Jungwirth, M.D.Laguna Niguel, CA 926771164566477
- Parisa Mortaji, MDLaguna Niguel, CA 926771083174841
- Erin Parise, MDLaguna Niguel, CA 926771225282775
- Zahra Shahim, MDLaguna Niguel, CA 926771023252657
- Patricia Ahearn, M.D.San Juan Capistrano, CA 926751982655304
Common questions
What is Sonja Stumme Krafcik, MD's NPI number?
Sonja Stumme Krafcik, MD's National Provider Identifier (NPI) is 1598767170, issued on Aug 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sonja Stumme Krafcik, MD located?
The NPPES record lists a practice address at 25500 Rancho Niguel RD, Laguna Niguel, CA, 92677. Phone: (949) 831-3686. Providers update this record themselves, so call before visiting.
How can I verify Sonja Stumme Krafcik, MD's license?
NPPES lists California license number C51621, 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 Sonja Stumme Krafcik, MD prescribe under Medicare Part D?
In 2024, Sonja Stumme Krafcik, MD had 9,823 Medicare Part D claims for 614 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.