Guy John Natale, M.D.
Internal Medicine Physician · Arcadia, CA
Guy John Natale, M.D. is an internal medicine physician with a practice address in Arcadia, California, and NPI 1255491510, issued on Dec 9, 2006. Check the license (California G45296, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Guy John Natale
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G45296 CA
Self-reported in NPPES; status is on the state search - Practice location
- 623 W Duarte RD Ste 8, Arcadia, CA 91007
- Phone
- (626) 447-9340
- Enumerated
- Dec 9, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (626) 447-8884
- Medicare enrollment
- Enrolled (PECOS I20110112000029); may accept Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 623 W Duarte RD Ste 8
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Taylor CoxHearing Instrument Specialist1952960130
- Patricia De La Rocha, NPNurse Practitioner1194580845
- Donald Portocarrero, D.O.Gastroenterology Physician1841503570
Verify Guy John Natale in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G45296Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,205 Medicare Part D claims for 101 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Levothyroxine Sodium72 claims
- Amlodipine Besylate71 claims
- Atorvastatin Calcium58 claims
- Azithromycin48 claims
- Potassium Chloride33 claims
- Lisinopril30 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.
Guy John Natale among 17,696 internal medicine physician records in California
Guy John Natale, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1980 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
74 internal medicine physician records list a practice address in Arcadia
They are 74 of the 2,033 NPPES records with a practice address in Arcadia, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Arcadia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Vincent Antosz, MDArcadia, CA 910071831150135
- Phillip Cabasso, M.D.Arcadia, CA 910071609812841
- Pai-Hsiang Chen, D.OArcadia, CA 910071063405892
- Kuancheng Chen, MDArcadia, CA 910071235125790
- Eric Chwa, M.DArcadia, CA 910071962433607
- Nilar Chwa, M.DArcadia, CA 910071316978067
- Mary Jones, M.D.Arcadia, CA 910071902873805
- Fauzia Khan, MDArcadia, CA 910071326039678
Common questions
What is Guy John Natale, M.D.'s NPI number?
Guy John Natale, M.D.'s National Provider Identifier (NPI) is 1255491510, issued on Dec 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Guy John Natale, M.D. located?
The NPPES record lists a practice address at 623 W Duarte RD Ste 8, Arcadia, CA, 91007. Phone: (626) 447-9340. Providers update this record themselves, so call before visiting.
How can I verify Guy John Natale, M.D.'s license?
NPPES lists California license number G45296, 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 Guy John Natale, M.D. prescribe under Medicare Part D?
In 2024, Guy John Natale, M.D. had 1,205 Medicare Part D claims for 101 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.