Maria Theresa Liwag Paz-Lum, MD
Internal Medicine Physician · San Rafael, CA
Maria Theresa Liwag Paz-Lum, MD is an internal medicine physician with a practice address in San Rafael, California, and NPI 1205082799, issued on Aug 15, 2008. Check the license (California A109693, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Maria Theresa Liwag Paz-Lum
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A109693 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4000 Civic Center Dr, San Rafael, CA 94903
- Phone
- (415) 492-3333
- Enumerated
- Aug 15, 2008
- Record last updated
- Jan 10, 2022
- Fax
- (415) 492-3425
- Medicare enrollment
- Enrolled (PECOS I20100115000389); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4000 Civic Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Call, RBTBehavior Analyst1558955682
- Morgan Camp, MDEmergency Medicine Physician1407845738
- Cynthia Clark, MDEmergency Medicine Physician1144219767
- Eugenia Clark, M.A. ED., BCBABehavior Analyst1811597537
- Mason Donnell, PHD, PAPhysician Assistant1891417390
- Estefany GutierrezBehavior Technician1063098135
Verify Maria Theresa Liwag Paz-Lum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109693Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% more Medicare Part D claims than the average internal medicine physician in 2024
6,175 Medicare Part D claims for 827 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 342 claims were for opioids.
Most prescribed
- Atorvastatin Calcium420 claims
- Lisinopril261 claims
- Levothyroxine Sodium251 claims
- Losartan Potassium239 claims
- Gabapentin213 claims
- Hydrocodone-Acetaminophen207 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.
Bills Medicare through one group practice
- Permanente Medical Group IncPetaluma, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Theresa Liwag Paz-Lum among 17,696 internal medicine physician records in California
Maria Theresa Liwag Paz-Lum, 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 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
51 internal medicine physician records list a practice address in San Rafael
They are 51 of the 3,159 NPPES records with a practice address in San Rafael, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Rafael → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Patricia Bauman, M.D.San Rafael, CA 949031710077482
- Bryn Duffy, MDSan Rafael, CA 949031235243775
- Jill Dunton, MDSan Rafael, CA 949031588748552
- Joseph Habis, M.D.San Rafael, CA 949031760439681
- Jeffrey Harris, MDSan Rafael, CA 949031134203136
- Alpana Kharkar, MDSan Rafael, CA 949031982788055
- Steven Killpack, MDSan Rafael, CA 949031477651149
- Alan Kneitel, MDSan Rafael, CA 949031417031584
Common questions
What is Maria Theresa Liwag Paz-Lum, MD's NPI number?
Maria Theresa Liwag Paz-Lum, MD's National Provider Identifier (NPI) is 1205082799, issued on Aug 15, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Maria Theresa Liwag Paz-Lum, MD located?
The NPPES record lists a practice address at 4000 Civic Center Dr, San Rafael, CA, 94903. Phone: (415) 492-3333. Providers update this record themselves, so call before visiting.
How can I verify Maria Theresa Liwag Paz-Lum, MD's license?
NPPES lists California license number A109693, 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 Maria Theresa Liwag Paz-Lum, MD prescribe under Medicare Part D?
In 2024, Maria Theresa Liwag Paz-Lum, MD had 6,175 Medicare Part D claims for 827 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.