DR. ANNE MARIA GRZEGORCZYK M.D.
NPI 1720434004
Internal Medicine - Pulmonary Disease in Walnut Creek, CA

Q: What is Anne Grzegorczyk's NPI number?

The NPI number for Anne Grzegorczyk is 1720434004. It was assigned to this individual provider in the NPPES registry on May 5, 2016.

Q: What is Anne Grzegorczyk's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Q: When was this NPI record last updated?

The NPPES record for Anne Grzegorczyk was last updated on April 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 May 05, 2016PECOS EnrolledAccepts Medicare Assignment

99.92/100

CMS Quality Rating

2700 YGNACIO VALLEY RD STE 100, WALNUT CREEK, CA 94598(925) 939-3050 Get Directions Write a Review

NPPES record last updated: April 22, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Anne Maria Grzegorczyk M.d. NPPES

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

DR. ANNE MARIA GRZEGORCZYK M.D. (NPI 1720434004) is an individual pulmonary disease provider in Walnut Creek, California, licensed in California (A154982) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS and is a graduate of Other (2016).

NPPES Registry Identity

NPI1720434004

Entity TypeIndividualFemale

Primary Taxonomy207RP1001X

Provider Legal NameDR. ANNE MARIA GRZEGORCZYKCredential: M.D.

Location Address2700 YGNACIO VALLEY RD STE 100Walnut Creek, CA 94598-3462

Mailing Address2700 Ygnacio Valley Rd Ste 100Walnut Creek, CA 94598-3462 · (925) 939-3050

Phone(925) 939-3050

Sole ProprietorNo

Medical School CMSOtherGraduated 2016

Enumeration DateMay 5, 2016

Last NPPES UpdateApril 22, 2024

NPPES CertifiedApril 22, 2024

✔ NPI 1720434004 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RP1001X

License✔ Licensed in CA · A154982

Definition

An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.

Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License A154982 (CA)

2700 YGNACIO VALLEY RD STE 100, Walnut Creek, CA 94598

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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. Anne Maria Grzegorczyk 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 ID4284062324

PECOS Enrollment IDI20200324000186

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 Anne Grzegorczyk reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Muir Pulmonary Critical Care

Same address

Pulmonary Disease

2700 YGNACIO VALLEY RD STE 100
Walnut Creek, CA 94598

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

NPI 1245225861 (925) 939-3050

John Muir Trauma Physicians Billing Service

1.5 mi

Trauma Surgery

1601 YGNACIO VALLEY RD
Walnut Creek, CA 94598

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

NPI 1962551861 (925) 947-5331

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 21

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.

380 services202 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.

325 services170 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.

155 services111 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.

77 services54 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.

74 services38 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.

59 services39 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.

51 services51 patients

Test to determine lung volumes using sensors 94726

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

34 services33 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

34 services33 patients

Irrigation and suction of lung airways to obtain cells using an endoscope 31624

This is a procedure where a thin, flexible tube called an endoscope is inserted through your mouth into the lungs. A small amount of saline is then introduced to wash the airways. The fluid, along with cells from the lung, is suctioned back for analysis.

33 services29 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

33 services33 patients

Test for exercise-induced lung stress 94618

An exercise-induced lung stress test assesses how your lungs respond to physical activity. During the test, you'll exercise on a treadmill or stationary bike while your heart rate, breathing, blood pressure, and oxygen levels are monitored. This helps identify any abnormal lung responses to exercise.

30 services29 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

30 services25 patients

Aspiration of initial secretion of lung airway using an endoscope 31645

This procedure involves using a thin, flexible tube called an endoscope to collect initial secretions from your lung airway. This helps doctors diagnose and treat respiratory conditions. It's a safe, minimally invasive procedure.

28 services27 patients

Ultrasound scan of chest 76604

An ultrasound scan of the chest is a non-invasive imaging procedure that uses sound waves to create pictures of the structures within your chest, such as your heart and lungs. It's a safe, painless method that helps doctors diagnose and monitor various conditions.

26 services25 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.

21 services21 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.

21 services21 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.

18 services15 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.

15 services15 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

15 services15 patients

Aspiration of fluid from chest cavity using imaging guidance 32555

This procedure, known as a thoracentesis, involves removing fluid from the space between the lungs and chest wall, called the pleural space. It's performed under imaging guidance to ensure precision. It can help diagnose conditions or relieve symptoms like shortness of breath.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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.

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.

99.92/100

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

Scored as part of a group practice

Quality

100

Promoting Interoperability

100

Improvement Activities

Cost

75.5

Reported Quality Measures

Colorectal Cancer Screening

64%44 patients3/55-star benchmark: 88%

Controlling High Blood Pressure

64%28 patients3/55-star benchmark: 91%

Documentation of Current Medications in the Medical Record

95%770 patients4/55-star benchmark: 100%

e-Prescribing

100%109 patients5/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

58%284 patients3/55-star benchmark: 100%

HIV Screening

25%44 patients2/55-star benchmark: 60%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

43%336 patients2/55-star benchmark: 98%

Preventive Care and Screening: Screening for Depression and Follow-Up Plan

43%274 patients2/55-star benchmark: 97%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients screened: 87% · 62 patients

84%62 patients

Provide Patients Electronic Access to Their Health Information

100%64 patients5/55-star benchmark: 100%

Statin Therapy for the Prevention and Treatment of Cardiovascular Disease

84%38 patients4/55-star benchmark: 91%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 11

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

DR. VALA BERJIS M.D.

Internal Medicine (Pulmonary Disease)