TIFFANY NGAI M.D.
NPI 1215378930
Internal Medicine - Infectious Disease in Santa Rosa, CA

Q: What is Tiffany Ngai's NPI number?

The NPI number for Tiffany Ngai is 1215378930. It was assigned to this individual provider in the NPPES registry on July 10, 2013.

Q: What is Tiffany Ngai's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Tiffany Ngai was last updated on November 9, 2021. 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.

Active since July 10, 2013PECOS EnrolledAccepts Medicare Assignment

1165 MONTGOMERY DR, SANTA ROSA, CA 95405(707) 547-5437(707) 547-5430 Get Directions Write a Review

NPPES record last updated: November 9, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Nov 9, 2021, Aug 2, 2021, Feb 4, 2021 and 2 more (5 updates tracked since 2018).

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About Tiffany Ngai M.d. NPPES

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

TIFFANY NGAI M.D. (NPI 1215378930) is an individual infectious disease provider in Santa Rosa, California, licensed in California (A138387) and active in the NPI registry since July 2013. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2013).

NPPES Registry Identity

NPI1215378930

Entity TypeIndividualFemale

Primary Taxonomy207RI0200X

Provider Legal NameTIFFANY NGAICredential: M.D.

Location Address1165 MONTGOMERY DRSanta Rosa, CA 95405-4801

Mailing Address155 N Fresno StFresno, CA 93701-2302

Phone(707) 547-5437

Fax(707) 547-5430

Sole ProprietorNo

Medical School CMSOtherGraduated 2013

Enumeration DateJuly 10, 2013

Last NPPES UpdateNovember 9, 20215 updates tracked since enumeration

NPPES CertifiedNovember 9, 2021

✔ NPI 1215378930 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in CA · A138387

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.

Also ListedInternal MedicineTaxonomy 207R00000X · License A138387 (CA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

1165 MONTGOMERY DR, Santa Rosa, CA 95405

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Secondary Practice Locations 2

Location 1500 W Hospital RdFrench Camp, CA 95231-9693 · Phone (209) 468-6000 · Fax (209) 468-7042

Location 2155 N Fresno StFresno, CA 93701 · Phone (559) 499-6484

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Tiffany Ngai 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 ID1355693458

PECOS Enrollment IDI20181017001345

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.

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.

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.

745 services192 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.

199 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.

183 services176 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

63 services40 patients

Telephone medical discussion with physician, 5-10 minutes 99441

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

18 services14 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

17 services15 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.

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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.

DR. RIDGELY OLIVER MULLER M.D.

Emergency Medicine

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5207

MRS. SONOE M OFT OTR/L

Occupational Therapist (Physical Rehabilitation)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5300

BETHANY HOFFMAN

Registered Nurse (Medical-Surgical)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5300

KATE ESTHER BLACK MD

Anesthesiology (Pain Medicine)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

SAAD SULTAN PHARMD

Pharmacist

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5380

CHASE DENNIS EMERGENCY MEDICAL GROUP INC

Emergency Medicine

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (925) 924-1600

JAMES JOHN MC KEITH M.D.

Emergency Medicine

1165 MONTGOMERY DR, SANTA ROSA MEMORIAL HOSPITAL
SANTA ROSA, CA 95405

Sonoma County (707) 525-5207

MATTHEW BRADY THOMAS M.D.

Emergency Medicine

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

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 Tiffany Ngai's NPI number?

The NPI number for Tiffany Ngai is 1215378930. It was assigned to this individual provider in the NPPES registry on July 10, 2013.

Where is Tiffany Ngai located?

Tiffany Ngai practices at 1165 Montgomery Dr, Santa Rosa, CA 95405. The listed phone number is (707) 547-5437.

What is Tiffany Ngai's specialty?

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

Is Tiffany Ngai enrolled in Medicare?

Yes. Tiffany Ngai 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.

When was this NPI record last updated?

The NPPES record for Tiffany Ngai was last updated on November 9, 2021. 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.