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GREGG TOLLIVER M.D.
NPI 1346286465
Internal Medicine - Infectious Disease in Greenbrae, CA

Active since June 20, 2006PECOS Enrolled
100A DRAKE'S LANDING ROAD, STE 225, GREENBRAE, CA 94904(415) 924-1214(415) 924-1375 Get Directions Write a Review

NPPES record last updated: August 18, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Gregg Tolliver M.d. NPPES

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

GREGG TOLLIVER M.D. (NPI 1346286465) is an individual infectious disease provider in Greenbrae, California, licensed in California (A88295) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Arizona College Of Medicine (1997).

NPPES Registry Identity

NPI1346286465
Entity TypeIndividualMale
Primary Taxonomy207RI0200X
Provider Legal NameGREGG TOLLIVERCredential: M.D.
Location Address100A DRAKE'S LANDING ROAD, STE 225Greenbrae, CA 94904
Mailing Address100a Drake's Landing Road, Ste 225Greenbrae, CA 94904 · (415) 924-1214 · Fax (415) 924-1375
Phone(415) 924-1214
Fax(415) 924-1375
Sole ProprietorNo
Medical School CMSUniversity Of Arizona College Of MedicineGraduated 1997
Enumeration DateJune 20, 2006
Last NPPES UpdateAugust 18, 2011
✔ NPI 1346286465 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · A88295
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
100A DRAKE'S LANDING ROAD, Greenbrae, CA 94904
Open in Google Maps ↗

Other Identifiers 4

Other1346286465CA · Type 1 Npi
Medicare UPINH26033
Medicaid00A882950CA
Medicare PIN00A882950CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregg Tolliver M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID446211304
PECOS Enrollment IDI20041023000118
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 Gregg Tolliver reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Prima Medical Foundation
7.9 mi
Clinic/Center
4 HAMILTON LANDING, SUITE 100
Novato, CA 94949
  • Reassigned Medicare billing, California enrollment
  • 111 clinicians in this Medicare group
NPI 1811217946 (415) 884-1840
Regents Univ Of California Ucsf
13 mi
Internal Medicine
505 PARNASSUS AVE
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 339 clinicians in this Medicare group
NPI 1124439807 (415) 476-1000

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 8

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
562 services155 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
167 services88 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
162 services148 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.
30 services30 patients
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.
21 services18 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
19 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94904 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
$154.04 typical visit price
range $69.07 – $202.63
Typical copayment $38.51 (range $17.26 – $50.65)
Most-billed visit code 99204
Established Patient
$119.61 typical visit price
range $23.44 – $166.64
Typical copayment $29.90 (range $5.86 – $41.66)
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 2

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

DR. JANET BODLE MD
General Practice
100A DRAKE'S LANDING ROAD, SUITE 225
GREENBRAE, CA 94904
Marin County (415) 924-1214
GUY SHIR LIVNAT MD
Internal Medicine (Pulmonary Disease)
100A DRAKE'S LANDING ROAD, SUITE 225
GREENBRAE, CA 94904
Marin County (415) 924-1214

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 Gregg Tolliver's NPI number?

The NPI number for Gregg Tolliver is 1346286465. It was assigned to this individual provider in the NPPES registry on June 20, 2006.

Where is Gregg Tolliver located?

Gregg Tolliver practices at 100A Drake's Landing Road Ste 225, Greenbrae, CA 94904. The listed phone number is (415) 924-1214.

What is Gregg Tolliver's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Gregg Tolliver enrolled in Medicare?

Yes. Gregg Tolliver is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gregg Tolliver's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregg Tolliver reassigns Medicare benefits to 2 organizations: Prima Medical Foundation (Novato, CA) and Regents Univ Of California Ucsf (San Francisco, 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 Gregg Tolliver'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 Gregg Tolliver was last updated on August 18, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.