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ERIC MAO M.D.
NPI 1043503295
Internal Medicine - Gastroenterology in Sacramento, CA

Active since May 20, 2011PECOS EnrolledAccepts Medicare Assignment
3160 FOLSOM BLVD STE 3500, SACRAMENTO, CA 95816(916) 734-8616(916) 451-2024 Get Directions Write a Review

NPPES record last updated: January 31, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 31, 2022, Jan 28, 2022, Jun 24, 2017 and 1 more (4 updates tracked since 2016).

About Eric Mao M.d. NPPES

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

ERIC MAO M.D. (NPI 1043503295) is an individual gastroenterology provider in Sacramento, California, licensed in California (A147641) and active in the NPI registry since May 2011. He is enrolled in Medicare PECOS and is a graduate of Warren Alpert Medical School Of Brown University (2011).

NPPES Registry Identity

NPI1043503295
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameERIC MAOCredential: M.D.
Location Address3160 FOLSOM BLVD STE 3500Sacramento, CA 95816-5270
Mailing Address3160 Folsom Blvd Ste 3500Sacramento, CA 95816-5270 · (916) 734-8616 · Fax (916) 451-2024
Phone(916) 734-8616
Fax(916) 451-2024
Sole ProprietorNo
Medical School CMSWarren Alpert Medical School Of Brown UniversityGraduated 2011
Enumeration DateMay 20, 2011
Last NPPES UpdateJanuary 31, 20224 updates tracked since enumeration
NPPES CertifiedJanuary 31, 2022
✔ NPI 1043503295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in CA · A147641✔ Licensed in RI · MD14655
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
3160 FOLSOM BLVD STE 3500, Sacramento, CA 95816
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Eric Mao M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8527286079
PECOS Enrollment IDI20170720002555
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Eric Mao reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of California
Same address
Multi-Specialty
3160 FOLSOM BLVD STE 1400
Sacramento, CA 95816
  • Reassigned Medicare billing, California enrollment
  • 918 clinicians in this Medicare group
NPI 1962482513 (916) 734-7777
Regents Of The University Of Ca
0.2 mi
Hematology & Oncology
1508 ALHAMBRA BLVD
Sacramento, CA 95816
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Regents Of The Univ Of Ca
  • 2,570 clinicians in this Medicare group
NPI 1528051679 (916) 734-5803

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

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 high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
119 services93 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
43 services42 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
39 services38 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.
39 services39 patients
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500
Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.
39 services37 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95816 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$137.20 typical visit price
range $60.44 – $180.85
Typical copayment $34.30 (range $15.11 – $45.21)
Most-billed visit code 99204
Established Patient
$105.95 typical visit price
range $19.88 – $148.15
Typical copayment $26.48 (range $4.97 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

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

KRISTEN MICHELLE WELLINGTON M.D.
Anesthesiology
3160 FOLSOM BLVD STE 3500
SACRAMENTO, CA 95816
Sacramento County (916) 734-8616
YESENIA RAMOS MD
Internal Medicine (Gastroenterology)
3160 FOLSOM BLVD STE 3500
SACRAMENTO, CA 95816
Sacramento County (916) 734-8616
HISHAM HUSSAN M.D.
Internal Medicine (Gastroenterology)
3160 FOLSOM BLVD STE 3500
SACRAMENTO, CA 95816
Sacramento County (916) 734-3759

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 Eric Mao's NPI number?

The NPI number for Eric Mao is 1043503295. It was assigned to this individual provider in the NPPES registry on May 20, 2011.

Where is Eric Mao located?

Eric Mao practices at 3160 Folsom Blvd Ste 3500, Sacramento, CA 95816. The listed phone number is (916) 734-8616.

What is Eric Mao's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Eric Mao enrolled in Medicare?

Yes. Eric Mao is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Eric Mao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Eric Mao reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (Sacramento, CA) and Regents Of The University Of Ca (Sacramento, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Eric Mao's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Eric Mao was last updated on January 31, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.