1. Home
  2. Directory
  3. California
  4. Oroville
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

THOMAS NELSON MUNDORFF MD
NPI 1154385383
Internal Medicine in Oroville, CA

Active since April 14, 2006
73.34/100
CMS Quality Rating
2721 OLIVE HWY, STE 12, OROVILLE, CA 95966(530) 533-6061(530) 533-4438 Get Directions Write a Review

NPPES record last updated: September 6, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Sep 6, 2026, Mar 7, 2023 (2 updates tracked since 2023).

About Thomas Nelson Mundorff Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THOMAS NELSON MUNDORFF MD (NPI 1154385383) is an individual internal medicine provider in Oroville, California, licensed in California (G25438) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1154385383
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameTHOMAS NELSON MUNDORFFCredential: MD
Location Address2721 OLIVE HWY, STE 12Oroville, CA 95966
Mailing Address2721 Olive Hwy, Ste 12Oroville, CA 95966 · (530) 533-6061 · Fax (530) 533-4438
Phone(530) 533-6061
Fax(530) 533-4438
Sole ProprietorNo
Enumeration DateApril 14, 2006
Last NPPES UpdateSeptember 6, 20262 updates tracked since enumeration
✔ NPI 1154385383 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G25438
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
2721 OLIVE HWY, Oroville, CA 95966
Open in Google Maps ↗

Other Identifiers 2

OtherG25438CA · State License
MedicaidGR0014101CA

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
531 services140 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
16 services16 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

73.34/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality36.89
Promoting Interoperability100
Improvement Activities40
Cost57.82

Other Providers at the Same Location NPPES 16

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ROY CARL SHANNON MD
Internal Medicine
2721 OLIVE HWY, STE 12
OROVILLE, CA 95966
Butte County (530) 533-6061
DR. VAUGHN JEFFREY SMITH M.D.
Family Medicine
2721 OLIVE HWY, SUITE 8
OROVILLE, CA 95966
Butte County (530) 532-1820
DR. KI XIONG DPM
Podiatrist (Foot & Ankle Surgery)
2721 OLIVE HWY, SUITE 5
OROVILLE, CA 95966
Butte County (530) 538-5660
JASVEENA KAUR RAI DHUGGA FNP-C
Nurse Practitioner (Family)
2721 OLIVE HWY
OROVILLE, CA 95966
Butte County (530) 533-8500
OROVILLE HOSPITAL
Clinic/Center (Rural Health)
2721 OLIVE HWY, SUITE 5
OROVILLE, CA 95966
Butte County (530) 538-3037
MISS ERIC REDMER PHARMD
Pharmacist
2721 OLIVE HWY
OROVILLE, CA 95966
Butte County (530) 534-9811
NARINDER SINGH
Internal Medicine
2721 OLIVE HWY, STE 12
OROVILLE, CA 95966
Butte County (530) 533-6061
JERRY DEE WATERS MD
Pain Medicine (Pain Medicine)
2721 OLIVE HWY, STE 9
OROVILLE, CA 95966
Butte County (530) 538-3020

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Mundorff's NPI number?

The NPI number for Thomas Mundorff is 1154385383. It was assigned to this individual provider in the NPPES registry on April 14, 2006.

Where is Thomas Mundorff located?

Thomas Mundorff practices at 2721 Olive Hwy Ste 12, Oroville, CA 95966. The listed phone number is (530) 533-6061.

What is Thomas Mundorff's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Thomas Mundorff was last updated on September 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.