FRANCES HUNGYI LU MD
NPI 1942445374
Internal Medicine - Gastroenterology in Santa Rosa, CA

Q: What is Frances Lu's NPI number?

The NPI number for Frances Lu is 1942445374. It was assigned to this individual provider in the NPPES registry on December 15, 2008.

Q: What is Frances Lu's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Frances Lu was last updated on December 3, 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 December 15, 2008PECOS EnrolledAccepts Medicare Assignment

500 DOYLE PARK DR STE 205, SANTA ROSA, CA 95405(707) 303-8350 Get Directions Write a Review

NPPES record last updated: December 3, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 3, 2021, Oct 14, 2021 (2 updates tracked since 2021).

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About Frances Hungyi Lu Md NPPES

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

FRANCES HUNGYI LU MD (NPI 1942445374) is an individual gastroenterology provider in Santa Rosa, California, licensed in California (101544) and active in the NPI registry since December 2008. She is enrolled in Medicare PECOS, maintains a secondary practice location in Vacaville, and is a graduate of Jefferson Medical College Of Thomas Jefferson University (2002).

NPPES Registry Identity

NPI1942445374

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameFRANCES HUNGYI LUCredential: MD

Location Address500 DOYLE PARK DR STE 205Santa Rosa, CA 95405-4559

Mailing Address485 Beacon Ridge LnWalnut Creek, CA 94597-2900 · (646) 421-4771

Phone(707) 303-8350

Sole ProprietorNo

Medical School CMSJefferson Medical College Of Thomas Jefferson UniversityGraduated 2002

Enumeration DateDecember 15, 2008

Last NPPES UpdateDecember 3, 20212 updates tracked since enumeration

NPPES CertifiedDecember 3, 2021

✔ NPI 1942445374 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · 101544

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

500 DOYLE PARK DR STE 205, Santa Rosa, CA 95405

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Secondary Practice Location 1

Location 11 Quality DrVacaville, CA 95688-9494 · Phone (707) 624-2668

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

Frances Hungyi Lu Md 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 ID8921294976

PECOS Enrollment IDI20101202000236

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 Frances Lu 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

Permanente Medical Group Inc

33 mi

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

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 18

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.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

157 services155 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

150 services144 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.

96 services91 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

86 services84 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

41 services41 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

40 services40 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

39 services33 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

31 services31 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

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.

30 services27 patients

Injection beneath lining of large bowel using a flexible endoscope 45381

This procedure involves a flexible tube, called an endoscope, being inserted into the large bowel. A small needle is then passed through the tube to inject medication under the bowel lining. This is typically done to treat inflammation or bleeding.

29 services28 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.

28 services24 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

18 services18 patients

Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43255

This procedure involves using a flexible tube with a light, called an endoscope, to examine and treat bleeding in the esophagus, stomach, or upper small bowel. It's a safe, effective way to control bleeding and ensure your digestive health.

16 services16 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.

16 services13 patients

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500

Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.

16 services16 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

13 services12 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.

13 services13 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.

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 Frances Lu's NPI number?

The NPI number for Frances Lu is 1942445374. It was assigned to this individual provider in the NPPES registry on December 15, 2008.

Where is Frances Lu located?

Frances Lu practices at 500 Doyle Park Dr Ste 205, Santa Rosa, CA 95405. The listed phone number is (707) 303-8350.

What is Frances Lu's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Frances Lu enrolled in Medicare?

Yes. Frances Lu 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 Frances Lu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Frances Lu reassigns Medicare benefits to 2 organizations: Providence Medical Foundation (Santa Rosa, CA) and Permanente Medical Group Inc (Vallejo, 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 Frances Lu'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 Frances Lu was last updated on December 3, 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.