DR. CHRISTOPHER ROBERT ENTWISLE M.D.
NPI 1841256963
Internal Medicine - Gastroenterology in Livermore, CA

Q: What is Christopher Entwisle's NPI number?

The NPI number for Christopher Entwisle is 1841256963. It was assigned to this individual provider in the NPPES registry on April 26, 2006.

Q: What is Christopher Entwisle's specialty?

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

Active since April 26, 2006PECOS EnrolledAccepts Medicare Assignment

1133 E STANLEY BLVD, SUITE 207, LIVERMORE, CA 94550(925) 245-1238(925) 245-9849 Get Directions Write a Review

NPPES record last updated: April 8, 2008. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Christopher Robert Entwisle M.d. NPPES

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

DR. CHRISTOPHER ROBERT ENTWISLE M.D. (NPI 1841256963) is an individual gastroenterology provider in Livermore, California, licensed in California (A95045) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (2000).

NPPES Registry Identity

NPI1841256963

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. CHRISTOPHER ROBERT ENTWISLECredential: M.D.

Location Address1133 E STANLEY BLVD, SUITE 207Livermore, CA 94550-4200

Mailing Address1133 E Stanley Blvd, Suite 207Livermore, CA 94550-4200 · (925) 245-1238 · Fax (925) 245-9849

Phone(925) 245-1238

Fax(925) 245-9849

Sole ProprietorNo

Medical School CMSNew York Medical CollegeGraduated 2000

Enumeration DateApril 26, 2006

Last NPPES UpdateApril 8, 2008

✔ NPI 1841256963 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 · A95045

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.

1133 E STANLEY BLVD, Livermore, CA 94550

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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

Dr. Christopher Robert Entwisle 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 ID1355352659

PECOS Enrollment IDI20060530000245

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 15

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.

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.

373 services276 patients

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.

129 services129 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.

118 services113 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.

111 services111 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

94 services94 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

86 services86 patients

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

41 services41 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.

27 services14 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.

26 services26 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.

26 services26 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.

23 services21 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.

23 services23 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.

18 services18 patients

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

14 services14 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.

14 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94550 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 18

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

YINETH ROCIO SMITH MD

Pediatrics

1133 E STANLEY BLVD, #103
LIVERMORE, CA 94550

Alameda County (925) 455-5050

STANFORD HEALTH CARE

Dermatology

1133 E STANLEY BLVD, SUITE 111
LIVERMORE, CA 94550

Alameda County (925) 373-4601

BAY AREA CARDIOLOGY MEDICAL GROUP

Internal Medicine (Interventional Cardiology)

1133 E STANLEY BLVD, SUITE 207
LIVERMORE, CA 94550

Alameda County (925) 294-9037

TRI-VALLEY FAMILY MEDICINE

Family Medicine

1133 E STANLEY BLVD, SUITE 201
LIVERMORE, CA 94550

Alameda County (925) 443-9000

KELLY MORRILL MSN, RN, FNP-BC, CEN

Nurse Practitioner (Family)

1133 E STANLEY BLVD
LIVERMORE, CA 94550

Alameda County (925) 373-4500

SCOTT DAVID EATON M.D.

Obstetrics & Gynecology (Obstetrics)

1133 E STANLEY BLVD, SUITE 205
LIVERMORE, CA 94550

Alameda County (925) 447-1010

JOHNETTE K LEIKAM MD

Pediatrics

1133 E STANLEY BLVD, #103
LIVERMORE, CA 94550

Alameda County (925) 455-5050

DR. LORENA H TAN MD

Family Medicine

1133 E STANLEY BLVD, SUITE 201
LIVERMORE, CA 94550

Alameda County (925) 443-9000

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 Christopher Entwisle's NPI number?

The NPI number for Christopher Entwisle is 1841256963. It was assigned to this individual provider in the NPPES registry on April 26, 2006.

Where is Christopher Entwisle located?

Christopher Entwisle practices at 1133 E Stanley Blvd Suite 207, Livermore, CA 94550. The listed phone number is (925) 245-1238.

What is Christopher Entwisle's specialty?

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

Is Christopher Entwisle enrolled in Medicare?

Yes. Christopher Entwisle 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 Christopher Entwisle was last updated on April 8, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.