Natalie Chang, M.D.
Internal Medicine Physician · Walnut Creek, CA
Natalie Chang, M.D. is an internal medicine physician with a practice address in Walnut Creek, California, and NPI 1548370786, issued on Aug 30, 2006. Check the license (California A67238, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Natalie Chang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A67238 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1450 Treat Blvd, Walnut Creek, CA 94597
- Phone
- (925) 296-9740
- Enumerated
- Aug 30, 2006
- Record last updated
- Apr 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (925) 296-9064
- Medicaid ID
- 00A672380 CA
- Medicare enrollment
- Enrolled (PECOS I20081205000489); accepts Medicare assignment
- Medical or professional school
- Albert Einstein College Of Medicine Of Yeshiva University, 1997
- 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 1450 Treat Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren Ables, D.O.Family Medicine Physician1710413299
- Andrea Agcaoili, D.O.Family Medicine Physician1265775035
- Sonal Aggarwal, MDFamily Medicine Physician1336336411
- Deborah Arce, M.D.Internal Medicine Physician1841215605
- Cynthia AshbrookAllergy & Immunology Physician1386786408
- Chanda Banwat, M.D.Internal Medicine Physician1750584389
Verify Natalie Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A67238Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average internal medicine physician in 2024
7,598 Medicare Part D claims for 756 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. 37 claims were for opioids.
Most prescribed
- Atorvastatin Calcium838 claims
- Levothyroxine Sodium414 claims
- Rosuvastatin Calcium385 claims
- Lisinopril309 claims
- Amlodipine Besylate295 claims
- Alendronate Sodium275 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.
Industry payments in 2024: $58.71
2 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- John Muir Physician NetworkWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Natalie Chang among 17,696 internal medicine physician records in California
Natalie Chang, 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
- Graduated1997 · 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).
183 internal medicine physician records list a practice address in Walnut Creek
They are 183 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Walnut Creek → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Deborah Arce, M.D.Walnut Creek, CA 945971841215605
- Devorah Ben-Zeev, M.D.Walnut Creek, CA 945971033160692
- Paul Endo, M.D.Walnut Creek, CA 945971568402014
- Poornima Goyal, M.D.Walnut Creek, CA 945971912933706
- Elise Hughes-Watkins, M.D.Walnut Creek, CA 945971578509741
- Thomas Miller, MDWalnut Creek, CA 945971750315560
- Robert Noriega, M.D.Walnut Creek, CA 945971922043249
- Sarah Rahman, M.D.Walnut Creek, CA 945971326068222
Common questions
What is Natalie Chang, M.D.'s NPI number?
Natalie Chang, M.D.'s National Provider Identifier (NPI) is 1548370786, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Natalie Chang, M.D. located?
The NPPES record lists a practice address at 1450 Treat Blvd, Walnut Creek, CA, 94597. Phone: (925) 296-9740. Providers update this record themselves, so call before visiting.
How can I verify Natalie Chang, M.D.'s license?
NPPES lists California license number A67238, 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 Natalie Chang, M.D. prescribe under Medicare Part D?
In 2024, Natalie Chang, M.D. had 7,598 Medicare Part D claims for 756 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.