MERCEDES LIM ANG M.D.
NPI 1033341813
Internal Medicine in Ellsworth, ME

Active since August 13, 2009PECOS EnrolledAccepts Medicare Assignment
50 UNION ST, ELLSWORTH, ME 04605(207) 664-5311 Get Directions Write a Review

NPPES record last updated: June 29, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jun 29, 2021, Sep 25, 2018 (2 updates tracked since 2018).

About Mercedes Lim Ang M.d. NPPES

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

MERCEDES LIM ANG M.D. (NPI 1033341813) is an individual internal medicine provider in Ellsworth, Maine, licensed in Maine (MD19406) and active in the NPI registry since August 2009. She is enrolled in Medicare PECOS, is affiliated with Northern Light Eastern Maine Medical Center, and is a graduate of Other (2001).

NPPES Registry Identity

NPI1033341813
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameMERCEDES LIM ANGCredential: M.D.
Location Address50 UNION STEllsworth, ME 04605-1534
Mailing Address50 Union StEllsworth, ME 04605-1534 · (207) 664-5311
Sole ProprietorNo
Medical School CMSOtherGraduated 2001
Enumeration DateAugust 13, 2009
Last NPPES UpdateJune 29, 20212 updates tracked since enumeration
NPPES CertifiedJune 29, 2021
NPI 1033341813 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in ME · MD19406
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License MT194315 (PA)
50 UNION ST, Ellsworth, ME 04605

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

Mercedes Lim Ang 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 ID1557512167
PECOS Enrollment IDI20121107000678
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 9

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.
132 services66 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.
37 services23 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.
37 services37 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.
27 services17 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
20 services19 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307
A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
18 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Northern Light Eastern Maine Medical Center

Acute Care Hospitals · Bangor, ME
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number200033
Location489 State StreetBangor, ME 04401 · Penobscot County
Emergency services Birthing friendly

Northern Light Maine Coast Hospital

Acute Care Hospitals · Ellsworth, ME
1/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number200050
Location50 Union StreetEllsworth, ME 04605 · Hancock County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 04605 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
$123.23 typical visit price
range $53.26 – $162.77
Typical copayment $30.80 (range $13.31 – $40.69)
Most-billed visit code 99204
Established Patient
$94.60 typical visit price
range $16.90 – $132.79
Typical copayment $23.65 (range $4.22 – $33.19)
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 2

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

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
3 suppliers70 claims70 services$20.71 avg. paid by Medicare
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
3 suppliers78 claims78 services$114.08 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.

Physician Assistant
50 UNION ST, SUITE 2100
ELLSWORTH, ME 04605
Internal Medicine
50 UNION ST
ELLSWORTH, ME 04605
Clinic/Center (Dental)
50 UNION ST
ELLSWORTH, ME 04605
Hospitalist
50 UNION ST
ELLSWORTH, ME 04605
Anesthesiology (Pain Medicine)
50 UNION ST
ELLSWORTH, ME 04605
Anesthesiology
50 UNION ST
ELLSWORTH, ME 04605
Emergency Medicine
50 UNION ST
ELLSWORTH, ME 04605
Nurse Practitioner (Obstetrics & Gynecology)
50 UNION ST
ELLSWORTH, ME 04605

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 Mercedes Ang's NPI number?

The NPI number for Mercedes Ang is 1033341813. It was assigned to this individual provider in the NPPES registry on August 13, 2009.

Where is Mercedes Ang located?

Mercedes Ang practices at 50 Union St, Ellsworth, ME 04605. The listed phone number is (207) 664-5311.

What is Mercedes Ang's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Mercedes Ang enrolled in Medicare?

Yes. Mercedes Ang 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 Mercedes Ang affiliated with any hospitals?

According to CMS data, Mercedes Ang is affiliated with Northern Light Eastern Maine Medical Center and Northern Light Maine Coast Hospital.

When was this NPI record last updated?

The NPPES record for Mercedes Ang was last updated on June 29, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.