DR. GREGORY SCOTT HOUGHTON M.D.
NPI 1649489402
Internal Medicine - Critical Care Medicine in Santa Rosa, CA

Q: What is Gregory Houghton's NPI number?

The NPI number for Gregory Houghton is 1649489402. It was assigned to this individual provider in the NPPES registry on May 21, 2007.

Q: What is Gregory Houghton's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Houghton was last updated on January 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.

Active since May 21, 2007PECOS EnrolledAccepts Medicare Assignment

500 DOYLE PARK DR, SUITE G04, SANTA ROSA, CA 95405(707) 303-8360(707) 303-8361 Get Directions Write a Review

NPPES record last updated: January 23, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Gregory Scott Houghton M.d. NPPES

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

DR. GREGORY SCOTT HOUGHTON M.D. (NPI 1649489402) is an individual critical care medicine provider in Santa Rosa, California, licensed in California (A121765) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of Other (2006).

NPPES Registry Identity

NPI1649489402

Entity TypeIndividualMale

Primary Taxonomy207RC0200X

Provider Legal NameDR. GREGORY SCOTT HOUGHTONCredential: M.D.

Location Address500 DOYLE PARK DR, SUITE G04Santa Rosa, CA 95405-4558

Mailing Address500 Doyle Park Dr, Suite G04Santa Rosa, CA 95405-4558 · (707) 303-8360 · Fax (707) 303-8361

Phone(707) 303-8360

Fax(707) 303-8361

Sole ProprietorNo

Medical School CMSOtherGraduated 2006

Enumeration DateMay 21, 2007

Last NPPES UpdateJanuary 23, 2025

NPPES CertifiedJanuary 23, 2025

✔ NPI 1649489402 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RC0200X

License✔ Licensed in CA · A121765

Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedEmergency MedicineTaxonomy 207P00000X · License 4301087479 (MI), A121765 (CA)

500 DOYLE PARK DR, Santa Rosa, CA 95405

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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

Dr. Gregory Scott Houghton 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 ID6406027317

PECOS Enrollment IDI20120918000502

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

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

Providence Medical Foundation

Same address

Internal Medicine

500 DOYLE PARK DR, SUITE 303
Santa Rosa, CA 95405

Reassigned Medicare billing, California enrollment
1,699 clinicians in this Medicare group

NPI 1740584473 (707) 303-8300

Chase Dennis Emergency Medical Group Inc

0.2 mi

Emergency Medicine

1165 MONTGOMERY DR
Santa Rosa, CA 95405

Reassigned Medicare billing, California enrollment
65 clinicians in this Medicare group

NPI 1033152350 (925) 924-1600

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 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.

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.

246 services132 patients

Critical care, each additional 30 minutes 99292

Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.

39 services26 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95405 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

$142.00 typical visit price

range $63.04 – $187.01

Typical copayment $35.50 (range $15.76 – $46.75)

Most-billed visit code 99204

Established Patient

$109.88 typical visit price

range $21.02 – $153.40

Typical copayment $27.47 (range $5.25 – $38.35)

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 20

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

LEO ARTHUR SMITH MD

Family Medicine

500 DOYLE PARK DR, SUITE G-04
SANTA ROSA, CA 95405

Sonoma County (707) 303-8360

CYNTHIA R. INGELS MSN,N.P.

Nurse Practitioner (Family)

500 DOYLE PARK DR, SUITE 103
SANTA ROSA, CA 95405

Sonoma County (707) 579-1102

DR. JAMES CHARLES DEVORE MD

Family Medicine

500 DOYLE PARK DR, SUITE G04
SANTA ROSA, CA 95405

Sonoma County (707) 303-8360

DR. TOMAS VASILIAUSKAS M.D.

Internal Medicine (Cardiovascular Disease)

500 DOYLE PARK DR, SUITE G05
SANTA ROSA, CA 95405

Sonoma County (707) 576-7100

ERAN MATALON M.D.

Internal Medicine

500 DOYLE PARK DR, SUITE 304
SANTA ROSA, CA 95405

Sonoma County (707) 545-1700

RAMZI KHALIL DEEIK M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

500 DOYLE PARK DR, SUITE G-05
SANTA ROSA, CA 95405

Sonoma County (707) 255-8825

DR. JOEL E PAINE MD

Internal Medicine

500 DOYLE PARK DR, SUITE 300
SANTA ROSA, CA 95405

Sonoma County (707) 303-8344

ANNADEL MEDICAL GROUP, INC

Pediatrics

500 DOYLE PARK DR, SUITE 100
SANTA ROSA, CA 95405

Sonoma County (707) 544-6090

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 Gregory Houghton's NPI number?

The NPI number for Gregory Houghton is 1649489402. It was assigned to this individual provider in the NPPES registry on May 21, 2007.

Where is Gregory Houghton located?

Gregory Houghton practices at 500 Doyle Park Dr Suite G04, Santa Rosa, CA 95405. The listed phone number is (707) 303-8360.

What is Gregory Houghton's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Gregory Houghton enrolled in Medicare?

Yes. Gregory Houghton 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 Gregory Houghton's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Houghton reassigns Medicare benefits to 2 organizations: Providence Medical Foundation (Santa Rosa, CA) and Chase Dennis Emergency Medical Group Inc (Santa Rosa, 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 Gregory Houghton'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 Gregory Houghton was last updated on January 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.