DR. ANDREA ONG M.D.
NPI 1902826472
Pathology - Anatomic Pathology & Clinical Pathology in Sacramento, CA

Q: What is Andrea Ong's NPI number?

The NPI number for Andrea Ong is 1902826472. It was assigned to this individual provider in the NPPES registry on July 20, 2006.

Q: What is Andrea Ong's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Andrea Ong was last updated on January 27, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 July 20, 2006PECOS EnrolledAccepts Medicare Assignment

81.78/100

CMS Quality Rating

3301 C ST, SUITE #200-E, SACRAMENTO, CA 95816(916) 447-6267(916) 447-0621 Get Directions Write a Review

NPPES record last updated: January 27, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Andrea Ong M.d. NPPES

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

DR. ANDREA ONG M.D. (NPI 1902826472) is an individual anatomic pathology & clinical pathology provider in Sacramento, California, licensed in California (A75526) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Massachusetts Medical School (1995).

NPPES Registry Identity

NPI1902826472

Entity TypeIndividualFemale

Primary Taxonomy207ZP0102X

Provider Legal NameDR. ANDREA ONGCredential: M.D.

Location Address3301 C ST, SUITE #200-ESacramento, CA 95816-3300

Mailing Address3301 C St, Suite #200-eSacramento, CA 95816-3300 · (916) 447-6267 · Fax (916) 447-0621

Phone(916) 447-6267

Fax(916) 447-0621

Sole ProprietorNo

Medical School CMSUniversity Of Massachusetts Medical SchoolGraduated 1995

Enumeration DateJuly 20, 2006

Last NPPES UpdateJanuary 27, 2021

NPPES CertifiedJanuary 27, 2021

✔ NPI 1902826472 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

License✔ Licensed in CA · A75526

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Also ListedSpecialistTaxonomy 174400000X · License A75526 (CA)

3301 C ST, Sacramento, CA 95816

Open in Google Maps ↗

Other Identifiers 4

OtherBF919XCA · Medicare Ptan

Medicaid00A755260CA

OtherBF919ZCA · Medicare Ptan

OtherBF919YCA · Medicare Ptan

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. Andrea Ong 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 ID1658324660

PECOS Enrollment IDI20050301000896

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 Reassignment

Medicare enrollment records show Andrea Ong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Diagnostic Pathology Medical Group Inc

Same address

Anatomic Pathology & Clinical Pathology

3301 C ST, #200E
Sacramento, CA 95816

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

NPI 1235138868 (916) 447-6267

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 24

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

774 services386 patients

Cell examination of specimen, selective cellular enhancement technique 88112

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

445 services413 patients

Pathology examination of tissue using a microscope, intermediate complexity 88305

336 services226 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

161 services51 patients

Evaluation of fine needle aspirate with interpretation and report 88173

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

152 services126 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

118 services91 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

113 services57 patients

Preparation of tissue for examination by removing any calcium present 88311

This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.

104 services98 patients

Pap test 88141

A Pap test is a routine exam that checks for changes in cells that could signal a health concern. During this test, a small sample of cells is gently collected from the lower region of the body. The sample is then examined under a microscope to ensure everything looks normal.

85 services82 patients

Pap test, automated thin layer preparation; automated system and manual rescreening 88175

A Pap test is a screening tool that helps detect unusual cells. The automated thin layer preparation involves placing your cell sample in a thin layer on a slide. An automated system then scans the slide, and experts manually review any areas flagged by the system. This method enhances the accuracy of the results.

84 services81 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

81 services32 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

79 services72 patients

Special stained specimen slides to examine tissue, initial procedure 88342

72 services54 patients

Detection test by nucleic acid for human papillomavirus (hpv), high-risk types 87624

This test detects high-risk types of HPV, a common virus. It's done by analyzing a small sample of cells for the presence of HPV DNA. The aim is to identify any high-risk types early, as they may increase the risk of certain health issues.

64 services61 patients

Cell examination of urine, manual 88120

A cell examination of urine, manually done, is a lab test where your urine is studied under a microscope. This helps identify any abnormal cells or substances in your urine, like bacteria or crystals, that could indicate health issues. It's a simple, non-invasive procedure.

55 services53 patients

Cell examination of specimen, selective cellular enhancement technique 88112

39 services33 patients

Infectious agent detection by nucleic acid (dna or rna); human papillomavirus (hpv), high-risk types (e.g., 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 68) for cervical cancer screening, must be performed in addition to pap test G0476

This service detects high-risk types of HPV, a common virus, by analyzing DNA or RNA. It's an essential part of cervical cancer screening, performed alongside the Pap test. This dual approach enhances accuracy, aiding early detection and treatment.

22 services22 patients

Special stained specimen slides to identify organisms including interpretation and report 88312

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

20 services12 patients

Pathology examination of tissue using a microscope, limited examination 88300

A pathology examination of tissue using a microscope is a procedure where a small sample of your tissue is observed under a microscope. This limited examination helps identify any abnormal cells or signs of disease, aiding in accurate diagnosis and treatment planning.

18 services17 patients

Evaluation of fine needle aspirate with interpretation and report 88173

16 services14 patients

Pathology examination of tissue using a microscope 88302

A pathology examination of tissue involves studying a small sample of your body's cells under a microscope. This helps identify any abnormalities or diseases, such as cancer. The process is crucial for accurate diagnosis and treatment planning.

15 services13 patients

Detection test by nucleic acid for human papillomavirus (hpv), types 16 and 18 only 87625

This test identifies specific types of HPV, a common virus, by examining your body's cells for the virus's genetic material. It's specifically designed to detect types 16 and 18, which are often associated with certain health risks. The procedure is safe and simple.

14 services13 patients

Evaluation of fine needle aspirate 88172

Evaluation of fine needle aspirate is a diagnostic procedure where a thin needle is used to collect cells from a lump or mass. This sample is then examined under a microscope to determine the nature of the lump, whether it's benign (non-cancerous) or malignant (cancerous).

13 services12 patients

Screening cytopathology, cervical or vaginal (any reporting system), collected in preservative fluid, automated thin layer preparation, with screening by automated system and manual rescreening under physician supervision G0145

This is a procedure to check for abnormal cells in the lower part of the womb or the birth canal. Cells are collected in a special fluid and prepared in a thin layer. They are then examined by an automated system and manually reviewed by a doctor for accuracy.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95816 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

$137.20 typical visit price

range $60.44 – $180.85

Typical copayment $34.30 (range $15.11 – $45.21)

Most-billed visit code 99204

Established Patient

$105.95 typical visit price

range $19.88 – $148.15

Typical copayment $26.48 (range $4.97 – $37.03)

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.

81.78/100

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

Scored as part of a group practice

Quality

78.57

Improvement Activities

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.

DR. CHAI SUE LEE MD

Dermatology

3301 C ST, STE. 1300
SACRAMENTO, CA 95816

Sacramento County (916) 734-6111

DR. MARY E KEOHANE M.D.

Specialist

3301 C ST, SUITE 200E
SACRAMENTO, CA 95816

Sacramento County (916) 447-6267

MS. SARAH RUTH WAGNER NP

Nurse Practitioner (Critical Care Medicine)

3301 C ST
SACRAMENTO, CA 95816

Sacramento County (916) 733-3390

OMA N AGBAI MD

Dermatology

3301 C ST
SACRAMENTO, CA 95816

Sacramento County (916) 734-6371

DR. KRISTEN VANDEWALKER M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

3301 C ST, SUITE 200-E
SACRAMENTO, CA 95816

Sacramento County (916) 447-6267

STEVEN W LIN M.D.

Student in an Organized Health Care Education/Training Program

3301 C ST, 1400
SACRAMENTO, CA 95816

Sacramento County (916) 734-1512

DR. MAXWELL FUNG MD

Dermatology (Dermatopathology)

3301 C ST, STE. 1300
SACRAMENTO, CA 95816

Sacramento County (916) 734-6111

DR. FORUM BHUPENDRA PATEL MD

Clinical Medical Laboratory

3301 C ST, #1400
SACRAMENTO, CA 95816

Sacramento County (916) 734-6657

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 Andrea Ong's NPI number?

The NPI number for Andrea Ong is 1902826472. It was assigned to this individual provider in the NPPES registry on July 20, 2006.

Where is Andrea Ong located?

Andrea Ong practices at 3301 C St Suite #200-E, Sacramento, CA 95816. The listed phone number is (916) 447-6267.

What is Andrea Ong's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Andrea Ong enrolled in Medicare?

Yes. Andrea Ong 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 organization bills Medicare for Andrea Ong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Andrea Ong reassigns Medicare benefits to Diagnostic Pathology Medical Group Inc (Sacramento, CA). The 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 Andrea Ong'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 Andrea Ong was last updated on January 27, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.