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DR. ALFORT BRIONES SANTOS M.D.,R.N
NPI 1376731505
Hospitalist in Lafayette, CA

Active since October 12, 2007PECOS EnrolledAccepts Medicare Assignment
3687 MT DIABLO BLVD STE 200, LAFAYETTE, CA 94549(916) 854-6975 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 21, 2022, May 18, 2017 (2 updates tracked since 2017).

About Dr. Alfort Briones Santos M.d.,r.n NPPES

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

DR. ALFORT BRIONES SANTOS M.D.,R.N (NPI 1376731505) is an individual hospitalist provider in Lafayette, California, licensed in California (A105031) and active in the NPI registry since October 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1998).

NPPES Registry Identity

NPI1376731505
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameDR. ALFORT BRIONES SANTOSCredential: M.D.,R.N
Location Address3687 MT DIABLO BLVD STE 200Lafayette, CA 94549-3746
Mailing Address1261 Stoney Creek DrSan Ramon, CA 94582-5627 · (925) 482-5316 · Fax (925) 551-4962
Phone(916) 854-6975
Sole ProprietorYes
Medical School CMSOtherGraduated 1998
Enumeration DateOctober 12, 2007
Last NPPES UpdateJuly 21, 20222 updates tracked since enumeration
✔ NPI 1376731505 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in CA · A105031
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedFamily MedicineTaxonomy 207Q00000X · License A105031 (CA)
3687 MT DIABLO BLVD STE 200, Lafayette, CA 94549
Open in Google Maps ↗

Other Identifiers 1

OtherA105031CA · State License

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

Dr. Alfort Briones Santos M.d.,r.n 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 ID6406905918
PECOS Enrollment IDI20090512000478
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 Alfort Santos reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sutter Bay Medical Foundation
2.9 mi
Multi-Specialty
12 CAMINO ENCINAS
Orinda, CA 94563
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1366898538 (510) 204-8180
John Muir Trauma Physicians Billing Service
5.1 mi
Hospitalist
1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598
  • Reassigned Medicare billing, California enrollment
  • 810 clinicians in this Medicare group
NPI 1093864837 (925) 947-5331

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 4

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.

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.
390 services348 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.
94 services93 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
24 services24 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94549 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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

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

DR. ROSALIA ALLAN MENDOZA MD
Family Medicine
3687 MT DIABLO BLVD STE 200
LAFAYETTE, CA 94549
Contra Costa County (925) 756-3499

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 Alfort Santos's NPI number?

The NPI number for Alfort Santos is 1376731505. It was assigned to this individual provider in the NPPES registry on October 12, 2007.

Where is Alfort Santos located?

Alfort Santos practices at 3687 Mt Diablo Blvd Ste 200, Lafayette, CA 94549. The listed phone number is (916) 854-6975.

What is Alfort Santos's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Alfort Santos enrolled in Medicare?

Yes. Alfort Santos 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 Alfort Santos's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alfort Santos reassigns Medicare benefits to 2 organizations: Sutter Bay Medical Foundation (Orinda, CA) and John Muir Trauma Physicians Billing Service (Walnut Creek, 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 Alfort Santos'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 Alfort Santos was last updated on July 21, 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.