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MR. FREDERICK PORRAL LOPEZ CRNA
NPI 1972668580
Nurse Anesthetist, Certified Registered in Vallejo, CA

Active since December 26, 2006Accepts Medicare Assignment
975 SERENO DRIVE, VALLEJO, CA 94589(707) 651-3884 Get Directions Write a Review

NPPES record last updated: June 23, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 11, 2022, Feb 4, 2022 (2 updates tracked since 2022).

About Mr. Frederick Porral Lopez Crna NPPES

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

MR. FREDERICK PORRAL LOPEZ CRNA (NPI 1972668580) is an individual nurse anesthetist, certified registered in Vallejo, California, licensed in California (3351) and active in the NPI registry since December 2006. He maintains a secondary practice location in Sacramento and is a graduate of Other (2005).

NPPES Registry Identity

NPI1972668580
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameMR. FREDERICK PORRAL LOPEZCredential: CRNA
Location Address975 SERENO DRIVEVallejo, CA 94589
Mailing Address152 Dartmouth PlBenicia, CA 94510-2019 · (215) 771-3968
Phone(707) 651-3884
Sole ProprietorNo
Medical School CMSOtherGraduated 2005
Enumeration DateDecember 26, 2006
Last NPPES UpdateJune 23, 20262 updates tracked since enumeration
NPPES CertifiedJune 23, 2026
✔ NPI 1972668580 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in CA · 3351
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
975 SERENO DRIVE, Vallejo, CA 94589
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Secondary Practice Location 1

Location 12725 Capitol Ave Dept 402Sacramento, CA 95816-6032 · Phone (916) 262-9002 · Fax (916) 262-9012

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

Mr. Frederick Porral Lopez Crna 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 ID9133136005
PECOS Enrollment IDI20060317000251

Medicare Billing Reassignments

3

Medicare enrollment records show Frederick Lopez reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
Same address
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000
Sutter Valley Medical Foundation
12 mi
Multi-Specialty
2720 LOW CT
Fairfield, CA 94534
NPI 1184859894 (707) 428-2731
Green Anesthesia
12 mi
Nurse Anesthetist, Certified Registered
2700 LOW CT FL 2
Fairfield, CA 94534
  • Reassigned Medicare billing, California enrollment
  • 64 clinicians in this Medicare group
NPI 1457039331 (707) 432-2700

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94589 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
$145.83 typical visit price
range $65.02 – $191.95
Typical copayment $36.45 (range $16.25 – $47.98)
Most-billed visit code 99204
Established Patient
$80.24 typical visit price
range $21.86 – $157.69
Typical copayment $20.06 (range $5.46 – $39.42)
Most-billed visit code 99213
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 14

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

DR. ROBYN ANNE LAKAMSANI M.D.
Family Medicine
975 SERENO DRIVE, MINOR INJURY CENTER, KAISER MEDICAL CENTER
VALLEJO, CA 94589
Napa County (925) 518-2297
MAGGIE GRAZELA MD
Student in an Organized Health Care Education/Training Program
975 SERENO DRIVE, FAMILY MEDICINE DEPARTMENT
VALLEJO, CA 94589
Napa County (707) 651-4071
TIEN-AN YANG MD, PHD
Ophthalmology
975 SERENO DRIVE, KAISER PERMANENTE MEDICAL CENTER
VALLEJO, CA 94589
Napa County (707) 651-5760
DR. ADRIANE MARIE ROXAS NGUYEN D.O.
Family Medicine
975 SERENO DRIVE
VALLEJO, CA 94589
Napa County (707) 651-1025
PERMANENTE MEDICAL GROUP INC
Internal Medicine
975 SERENO DRIVE
VALLEJO, CA 94589
Napa County (707) 651-1000
DR. AMY KONG PHARM.D.
Pharmacist
975 SERENO DRIVE, MOB, MEDICINE 2
VALLEJO, CA 94589
Napa County (707) 651-4981
ELIZA ARREOLA-LAPUZ
Pharmacist
975 SERENO DRIVE, ; KAISER PHARMACY 1
VALLEJO, CA 94589
Napa County (707) 651-1000
ALJANEE WHITAKER
Family Medicine
975 SERENO DRIVE, FAMILY MEDICINE DEPARTMENT
VALLEJO, CA 94589
Napa County (707) 651-4071

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 Frederick Lopez's NPI number?

The NPI number for Frederick Lopez is 1972668580. It was assigned to this individual provider in the NPPES registry on December 26, 2006.

Where is Frederick Lopez located?

Frederick Lopez practices at 975 Sereno Drive, Vallejo, CA 94589. The listed phone number is (707) 651-3884.

What is Frederick Lopez's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Frederick Lopez enrolled in Medicare?

Yes. Frederick Lopez 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 Frederick Lopez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Frederick Lopez reassigns Medicare benefits to 3 organizations: Permanente Medical Group Inc (Vallejo, CA), Sutter Valley Medical Foundation (Fairfield, CA) and Green Anesthesia (Fairfield, 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 Frederick Lopez'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 Frederick Lopez was last updated on June 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.