DR. ERNEST TSAO MD
NPI 1790981256
Internal Medicine - Gastroenterology in Baltimore, MD

Q: What is Ernest Tsao's NPI number?

The NPI number for Ernest Tsao is 1790981256. It was assigned to this individual provider in the NPPES registry on June 22, 2007.

Q: What is Ernest Tsao'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 Ernest Tsao was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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 June 22, 2007PECOS EnrolledAccepts Medicare Assignment

84.79/100

CMS Quality Rating

1838 GREENE TREE RD, STE 400, BALTIMORE, MD 21208(410) 602-7782(410) 602-2438 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Dr. Ernest Tsao Md NPPES

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

DR. ERNEST TSAO MD (NPI 1790981256) is an individual gastroenterology provider in Baltimore, Maryland, licensed in Maryland (D66308) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Medstar Harbor Hospital, and is a graduate of Other (2001).

NPPES Registry Identity

NPI1790981256

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. ERNEST TSAOCredential: MD

Location Address1838 GREENE TREE RD, STE 400Baltimore, MD 21208-6391

Mailing Address1838 Greene Tree Rd, Ste 400Baltimore, MD 21208-6391 · (410) 602-7782 · Fax (410) 602-2438

Phone(410) 602-7782

Fax(410) 602-2438

Sole ProprietorNo

Medical School CMSOtherGraduated 2001

Enumeration DateJune 22, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1790981256 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 MD · D66308

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.

1838 GREENE TREE RD, Baltimore, MD 21208

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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. Ernest Tsao 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 ID5890888580

PECOS Enrollment IDI20070911000974

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 20

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.

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.

285 services267 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.

282 services190 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.

123 services119 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.

113 services113 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.

84 services83 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.

67 services50 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.

58 services57 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.

57 services49 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.

49 services47 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.

42 services38 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.

37 services37 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.

35 services35 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.

28 services25 patients

Incision of pancreatic outlet using a flexible endoscope 43262

This procedure involves a small cut in the outlet of the pancreas using a flexible tube with a camera, called an endoscope. It helps doctors diagnose and treat conditions affecting the pancreas, enhancing patient comfort and recovery.

27 services26 patients

Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 43264

This procedure, called an endoscopic retrograde cholangiopancreatography (ERCP), involves using a flexible tube with a camera (endoscope) to locate and remove stones or debris from your bile or pancreatic duct. It's a non-surgical method to clear the ducts, enhancing your digestive health.

20 services20 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.

19 services19 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.

19 services19 patients

Insertion of stomach tube using a flexible endoscope 43246

This procedure involves the use of a flexible endoscope, a thin tube with a light and camera, to insert a stomach tube. It helps doctors view and access your stomach without surgery. It's typically performed under sedation to ensure comfort.

17 services15 patients

Insertion of stent into pancreatic or bile duct using a flexible endoscope 43274

This procedure involves the placement of a tiny tube, known as a stent, into your pancreatic or bile duct. A flexible endoscope, a long, thin instrument with a light and camera, is used. It aids in relieving blockages and improving flow in these ducts.

17 services17 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.

11 services11 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Medstar Harbor Hospital

Acute Care Hospitals · Baltimore, MD

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210034

Location3001 South Hanover StreetBaltimore, MD 21225 · Baltimore City County

Birthing friendly

University Of MD Baltimore Washington Medical Center

Acute Care Hospitals · Glen Burnie, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number210043

Location301 Hospital DriveGlen Burnie, MD 21061 · Anne Arundel County

Emergency services Birthing friendly

Johns Hopkins Howard County Medical Center

Acute Care Hospitals · Columbia, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210048

Location5755 Cedar LaneColumbia, MD 21044 · Howard County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21208 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

$139.05 typical visit price

range $60.73 – $183.44

Typical copayment $34.76 (range $15.18 – $45.86)

Most-billed visit code 99204

Established Patient

$106.59 typical visit price

range $19.60 – $149.17

Typical copayment $26.64 (range $4.90 – $37.29)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

84.79/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

69.7

Promoting Interoperability

100

Improvement Activities

Cost

79.62

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.

EDWARD ZIMMERMAN M.D.

Internal Medicine (Gastroenterology)

1838 GREENE TREE RD, STE 400
BALTIMORE, MD 21208

Baltimore County (410) 602-7782

KEN M ZONIES MD LLC

Internal Medicine

1838 GREENE TREE RD, STE 300
PIKESVILLE, MD 21208

Baltimore County (410) 653-0366

DR. NORBERT ZEMANKIEWICZ D.O.

Surgery

1838 GREENE TREE RD, SUITE 285
PIKESVILLE, MD 21208

Baltimore County (410) 602-0777

SHOSHANA COHEN O.D.

Optometrist

1838 GREENE TREE RD, SUITE 225
BALTIMORE, MD 21208

Baltimore County (410) 653-0200

MILAN WISTER M.D.

Internal Medicine

1838 GREENE TREE RD, SUITE 535
PIKESVILLE, MD 21208

Baltimore County (443) 438-4925

OROSZLAN LLC

Internal Medicine

1838 GREENE TREE RD, STE 300
PIKESVILLE, MD 21208

Baltimore County (410) 653-0366

CENTER FOR PAIN MANAGEMENT, LLC

Pain Medicine (Interventional Pain Medicine)

1838 GREENE TREE RD, SUITE 150
PIKESVILLE, MD 21208

Baltimore County (410) 383-7443

LIFEBRIDGE COMMUNITY GASTROENTEROLOGY, LLC

Internal Medicine (Gastroenterology)

1838 GREENE TREE RD, SUITE 400
PIKESVILLE, MD 21208

Baltimore County (410) 602-7782

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 Ernest Tsao's NPI number?

The NPI number for Ernest Tsao is 1790981256. It was assigned to this individual provider in the NPPES registry on June 22, 2007.

Where is Ernest Tsao located?

Ernest Tsao practices at 1838 Greene Tree Rd Ste 400, Baltimore, MD 21208. The listed phone number is (410) 602-7782.

What is Ernest Tsao's specialty?

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

Is Ernest Tsao enrolled in Medicare?

Yes. Ernest Tsao 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.

Is Ernest Tsao affiliated with any hospitals?

According to CMS data, Ernest Tsao is affiliated with Medstar Harbor Hospital, University Of MD Baltimore Washington Medical Center and Johns Hopkins Howard County Medical Center.

When was this NPI record last updated?

The NPPES record for Ernest Tsao was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.