Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. ABRAHAM K CHUNG M.D.
NPI 1104845858
Hospitalist in Walnut Creek, CA

Q: What is Abraham Chung's NPI number?

The NPI number for Abraham Chung is 1104845858. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Q: What is Abraham Chung's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Abraham Chung was last updated on August 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days 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 19, 2006PECOS Enrolled

85.73/100

CMS Quality Rating

1601 YGNACIO VALLEY RD, WALNUT CREEK, CA 94598(925) 947-3393(925) 947-3396 Get Directions Write a Review

NPPES record last updated: August 5, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. Abraham K Chung M.d. NPPES

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

DR. ABRAHAM K CHUNG M.D. (NPI 1104845858) is an individual hospitalist provider in Walnut Creek, California, licensed in California (A74982) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of California, Geffen School Of Medicine (1999).

NPPES Registry Identity

NPI1104845858

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NameDR. ABRAHAM K CHUNGCredential: M.D.

Location Address1601 YGNACIO VALLEY RDWalnut Creek, CA 94598-3122

Mailing AddressPo Box 102858Pasadena, CA 91189-2858 · (925) 952-2828 · Fax (925) 952-2850

Phone(925) 947-3393

Fax(925) 947-3396

Sole ProprietorNo

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 1999

Enumeration DateJuly 19, 2006

Last NPPES UpdateAugust 5, 2026

NPPES CertifiedAugust 5, 2026

✔ NPI 1104845858 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in CA · A74982

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License A74982 (CA)

1601 YGNACIO VALLEY RD, Walnut Creek, CA 94598

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Secondary Practice Locations 2

Location 12540 East StConcord, CA 94520-1906 · Phone (925) 674-2609 · Fax (925) 674-2211

Location 22700 Grant St Ste 200Concord, CA 94520-2270 · Phone (925) 674-2609

Other Identifiers 1

Medicaid00A749820CA

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. Abraham K Chung 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 ID5496819328

PECOS Enrollment IDI20090121000608

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 4

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 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.

363 services115 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.

169 services166 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

74 services71 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

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.

85.73/100

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

Scored as part of a group practice

Quality

82.68

Promoting Interoperability

Improvement Activities

Cost

70.58

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers19 claims20 services$69.00 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MALCOLM C JOHNSON MD

Emergency Medicine