Sydney A. Westphal, MD
Endocrinology, Diabetes & Metabolism Physician · Scottsdale, AZ
Sydney A. Westphal, MD is an endocrinology, diabetes & metabolism physician with a practice address in Scottsdale, Arizona, and NPI 1083651830, issued on Jun 1, 2006. Check the license (Arizona 18668, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Sydney A. Westphal
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 18668 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 13400 E Shea Blvd, Scottsdale, AZ 85259
- Phone
- (480) 301-8000
- Enumerated
- Jun 1, 2006
- Record last updated
- Sep 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050411000379); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 1983
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 175 in Arizona → Look up another NPI →
Also registered at 13400 E Shea Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sydney A. Westphal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 18668Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
792 Medicare Part D claims for 265 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Levothyroxine Sodium225 claims
- Ozempic49 claims
- Alendronate Sodium37 claims
- Methimazole34 claims
- Prednisone28 claims
- Metformin Hcl27 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 practice group's MIPS final score for 2023 (Medicare payment program): 78.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $14.52
1 payment: education; the largest payer was Radius Health, Inc. 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.
Bills Medicare through one group practice
- Mayo Clinic ArizonaScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sydney A. Westphal among 175 endocrinology, diabetes & metabolism physician records in Arizona
Sydney A. Westphal, MD is one of 175 endocrinology, diabetes & metabolism physician records with a practice address in Arizona. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 61% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1983 · median 2005 among the 107 with a school on file
- Record last updated2020 · 37% 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 Arizona 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 Arizona
There are 175 endocrinology, diabetes & metabolism physician records in Arizona.
All 175 in Arizona → Every provider in Scottsdale → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Osamah Al Ali, MDScottsdale, AZ 852591407485337
- Rodolfo Argueta, M.D.Scottsdale, AZ 852591275517369
- Curtiss Cook, MDScottsdale, AZ 852591093705204
- Elena Anna De Filippis, MDScottsdale, AZ 852591649451006
- Krupa Doshi, MDScottsdale, AZ 852591386837789
- Irving Guatemala Funes, MDScottsdale, AZ 852591295468791
- Craig Jenkins, D.O.Scottsdale, AZ 852591619316346
- Aditi KumarScottsdale, AZ 852591497061915
Common questions
What is Sydney A. Westphal, MD's NPI number?
Sydney A. Westphal, MD's National Provider Identifier (NPI) is 1083651830, issued on Jun 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sydney A. Westphal, MD located?
The NPPES record lists a practice address at 13400 E Shea Blvd, Scottsdale, AZ, 85259. Phone: (480) 301-8000. Providers update this record themselves, so call before visiting.
How can I verify Sydney A. Westphal, MD's license?
NPPES lists Arizona license number 18668, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sydney A. Westphal, MD prescribe under Medicare Part D?
In 2024, Sydney A. Westphal, MD had 792 Medicare Part D claims for 265 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Sydney A. Westphal, MD's MIPS final score?
The 2023 MIPS final score is 78.6 of 100, reported for the practice group. 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.