ANNA SUK-FONG LOK MD
NPI 1013090935
Internal Medicine - Gastroenterology in Ann Arbor, MI

Q: What is Anna Lok's NPI number?

The NPI number for Anna Lok is 1013090935. It was assigned to this individual provider in the NPPES registry on October 23, 2006.

Q: What is Anna Lok'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 Anna Lok was last updated on November 5, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 October 23, 2006PECOS EnrolledAccepts Medicare Assignment

1500 E MEDICAL CENTER DR, ANN ARBOR, MI 48109(734) 936-4000 Get Directions Write a Review

NPPES record last updated: November 5, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Anna Suk-fong Lok Md NPPES

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

ANNA SUK-FONG LOK MD (NPI 1013090935) is an individual gastroenterology provider in Ann Arbor, Michigan, licensed in Michigan (4301067002) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Other (1977).

NPPES Registry Identity

NPI1013090935

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameANNA SUK-FONG LOKCredential: MD

Location Address1500 E MEDICAL CENTER DRAnn Arbor, MI 48109-5000

Mailing Address3621 S State StAnn Arbor, MI 48108-1633 · (734) 647-5299

Phone(734) 936-4000

Sole ProprietorNo

Medical School CMSOtherGraduated 1977

Enumeration DateOctober 23, 2006

Last NPPES UpdateNovember 5, 2019

✔ NPI 1013090935 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in MI · 4301067002

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.

Also ListedInternal MedicineTaxonomy 207R00000X · License 4301067002 (MI)

Also ListedInternal Medicine · HepatologyTaxonomy 207RI0008X · License 4301067002 (MI)

1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109

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Other Identifiers 1

Medicaid3221140MI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Priority Health.Insurance ›

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

Anna Suk-fong Lok 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 ID4385773324

PECOS Enrollment IDI20100601000049

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 Anna Lok reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of Michigan

Same address

Nephrology

1500 E MEDICAL CENTER DR
Ann Arbor, MI 48109

Reassigned Medicare billing, Michigan enrollment
2,377 clinicians in this Medicare group

NPI 1003848144 (734) 936-4000

Edward W. Sparrow Hospital Association

48 mi

Obesity Medicine

2900 HANNAH BLVD, SUITE 216
East Lansing, MI 48823

Reassigned Medicare billing, Michigan enrollment
84 clinicians in this Medicare group

NPI 1083982748 (517) 364-8100

Sparrow Ionia Hospital

71 mi

Rural Health

9751 E GRAND RIVER AVE
Portland, MI 48875

Reassigned Medicare billing, Michigan enrollment
317 clinicians in this Medicare group

NPI 1295801108 (517) 647-6722

Sparrow Carson Hospital

84 mi

Anesthesiology

406 E ELM ST
Carson City, MI 48811

Reassigned Medicare billing, Michigan enrollment
22 clinicians in this Medicare group

NPI 1396789798 (989) 584-3971

Metropolitan Hospital

104 mi

Urgent Care

4055 CASCADE RD SE
Grand Rapids, MI 49546

Reassigned Medicare billing, Michigan enrollment
685 clinicians in this Medicare group

NPI 1720590961 (616) 252-4010

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 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.

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.

65 services47 patients

Measurement of liver stiffness 91200

Measurement of liver stiffness is a non-invasive procedure that helps assess the health of your liver. It uses sound waves to detect the hardness of the liver tissue, which can indicate conditions like fibrosis or cirrhosis. It's a simple, painless test that provides valuable information about your liver's health.

42 services42 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.

32 services32 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.

23 services12 patients

Hospital Affiliations CMS Care Compare 4

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

Spectrum Health

Acute Care Hospitals · Grand Rapids, MI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230038

Location100 Michigan St NEGrand Rapids, MI 49503 · Kent County

Emergency services Birthing friendly

University Of Michigan Health System

Acute Care Hospitals · Ann Arbor, MI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230046

Location1500 E Medical Center Drive, Spc 5474Ann Arbor, MI 48109 · Washtenaw County

Emergency services Birthing friendly

Covenant Medical Center

Acute Care Hospitals · Saginaw, MI

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230070

Location1447 N HarrisonSaginaw, MI 48602 · Saginaw County

Emergency services Birthing friendly

Henry Ford Health Wyandotte Hospital

Acute Care Hospitals · Wyandotte, MI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230146

Location2333 Biddle AveWyandotte, MI 48192 · Wayne County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48109 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

$134.28 typical visit price

range $58.04 – $177.36

Typical copayment $33.57 (range $14.51 – $44.34)

Most-billed visit code 99204

Established Patient

$102.35 typical visit price

range $18.32 – $143.49

Typical copayment $25.58 (range $4.58 – $35.87)

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.

Referred Medical Equipment & Supplies CMS DME claims 5

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

Tacrolimus, extended release, (envarsus xr), oral, 0.25 mg J7503

Treatment-Chemotherapy · category RH002N

1 supplier34 claims12,960 services$1.19 avg. paid by Medicare

Cyclosporine, oral, 25 mg J7515

Treatment-Treatment - Miscellaneous · category RX029N

2 suppliers18 claims1,020 services$0.56 avg. paid by Medicare

Mycophenolate mofetil, oral, 250 mg J7517

Treatment-Treatment - Miscellaneous · category RX029N

3 suppliers24 claims4,440 services$0.18 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511

Treatment-Chemotherapy · category RH012N

4 suppliers42 claims42 services$18.52 avg. paid by Medicare

Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512

Treatment-Chemotherapy · category RH012N

4 suppliers33 claims44 services$12.64 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.

LOKMAN SUNG MD

Pathology (Forensic Pathology)

1500 E MEDICAL CENTER DR, 2ND FLOOR UNIVERSITY HOSPITAL RECP PATHOLOGY
ANN ARBOR, MI 48109

Washtenaw County (800) 862-7284

SAMEER DEV SAINI M.D.

Internal Medicine (Gastroenterology)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

KYLE DAVID PERRY MD

Pathology (Cytopathology)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

DR. DAVID ALEXANDER STEWART M.D.

Pediatrics

1500 E MEDICAL CENTER DR, 12TH FLOOR C.S. MOTT CHILDREN'S HOSPITAL ROOM 525
ANN ARBOR, MI 48109

Washtenaw County (734) 763-5302

DR. MICHAEL EDMUND WATSON MD

Pediatrics (Pediatric Infectious Diseases)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

CARRIE KRAEGER PORTER PA-C

Physician Assistant

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-6666

DENISE LYNN BERRY CRNA

Nurse Anesthetist, Certified Registered

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

KETTI SOPHIA PETERSEN MD

Family Medicine (Hospice and Palliative Medicine)

1500 E MEDICAL CENTER DR
ANN ARBOR, MI 48109

Washtenaw County (734) 936-4000

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 Anna Lok's NPI number?

The NPI number for Anna Lok is 1013090935. It was assigned to this individual provider in the NPPES registry on October 23, 2006.

Where is Anna Lok located?

Anna Lok practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-4000.

What is Anna Lok's specialty?

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

Is Anna Lok enrolled in Medicare?

Yes. Anna Lok 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 organizations bill Medicare for Anna Lok's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Anna Lok reassigns Medicare benefits to 5 organizations: Regents Of The University Of Michigan (Ann Arbor, MI), Edward W. Sparrow Hospital Association (East Lansing, MI), Sparrow Ionia Hospital (Portland, MI), Sparrow Carson Hospital (Carson City, MI) and Metropolitan Hospital (Grand Rapids, MI). Each 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 Anna Lok's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Anna Lok accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Anna Lok as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Anna Lok affiliated with any hospitals?

According to CMS data, Anna Lok is affiliated with Spectrum Health, University Of Michigan Health System, Covenant Medical Center and Henry Ford Health Wyandotte Hospital.

When was this NPI record last updated?

The NPPES record for Anna Lok was last updated on November 5, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.