DR. GARRETT GREENAN MD
NPI 1225579584
Internal Medicine - Gastroenterology in Davidson, NC

Q: What is Garrett Greenan's NPI number?

The NPI number for Garrett Greenan is 1225579584. It was assigned to this individual provider in the NPPES registry on March 20, 2017.

Q: What is Garrett Greenan'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 Garrett Greenan was last updated on January 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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 March 20, 2017PECOS EnrolledAccepts Medicare Assignment

91.06/100

CMS Quality Rating

705 GRIFFITH ST STE 205, DAVIDSON, NC 28036(704) 372-7974(704) 372-8201 Get Directions Write a Review

NPPES record last updated: January 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jan 13, 2026, Aug 15, 2023, Jun 14, 2023 and 4 more (7 updates tracked since 2017).

On this page

About Dr. Garrett Greenan Md NPPES

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

DR. GARRETT GREENAN MD (NPI 1225579584) is an individual gastroenterology provider in Davidson, North Carolina, licensed in North Carolina (2023-01019) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with Carolinas Medical Center-northeast, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1225579584

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. GARRETT GREENANCredential: MD

Location Address705 GRIFFITH ST STE 205Davidson, NC 28036-9307

Mailing Address3426 Toringdon Way Ste 108Charlotte, NC 28277-3497 · (704) 372-7974 · Fax (704) 970-4746

Phone(704) 372-7974

Fax(704) 372-8201

Sole ProprietorNo

Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2017

Enumeration DateMarch 20, 2017

Last NPPES UpdateJanuary 13, 20267 updates tracked since enumeration

NPPES CertifiedJanuary 13, 2026

✔ NPI 1225579584 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in NC · 2023-01019✔ Licensed in MO · 2020011722

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.

705 GRIFFITH ST STE 205, Davidson, NC 28036

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Secondary Practice Locations 2

Location 1300 Billingsley Rd Ste 200Charlotte, NC 28211-1180 · Phone (704) 372-7974 · Fax (704) 372-8201

Location 28210 University Exec Park Dr Ste 100Charlotte, NC 28262-1329 · Phone (704) 372-7974 · Fax (704) 372-8201

Other Identifiers 2

Other2021045755MO · Permanent Missouri State License

Other2023-01019NC · Ncmb

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee and more.Insurance ›

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. Garrett Greenan 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 ID7911325931

PECOS Enrollment IDI20230901003342

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 18

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.

Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439

Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.

1,562 services133 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

883 services134 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.

332 services173 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

125 services124 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

113 services105 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.

103 services103 patients

Management using the results of remote vital sign monitoring per calendar month, first 20 minutes 99457

This service involves reviewing and managing your health data, which is remotely monitored and collected. Your vital signs like heart rate and blood pressure are tracked regularly throughout the month. The first 20 minutes of this data analysis per month is included in this service.

73 services13 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

61 services60 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.

55 services31 patients

Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days 99454

This service involves using devices to remotely track body functions like heart rate or blood pressure. These devices, provided initially, record data daily or send alerts if readings are abnormal. The service is renewed every 30 days.

50 services13 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

46 services43 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.

45 services29 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

40 services40 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.

36 services35 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.

30 services30 patients

Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

29 services29 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

27 services21 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

21 services21 patients

Hospital Affiliations CMS Care Compare 5

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

Carolinas Medical Center-Northeast

Acute Care Hospitals · Concord, NC

4/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number340001

Location920 Church St NConcord, NC 28025 · Cabarrus County

Emergency services Birthing friendly

Novant Health Presbyterian Medical Center

Acute Care Hospitals · Charlotte, NC

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number340053

Location200 Hawthorne Lane Box 33549Charlotte, NC 28233 · Mecklenburg County

Emergency services Birthing friendly

Carolinas Medical Center/Behav Health

Acute Care Hospitals · Charlotte, NC

2/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number340113

Location1000 Blythe BlvdCharlotte, NC 28203 · Mecklenburg County

Emergency services Birthing friendly

Atrium Health University City

Acute Care Hospitals · Charlotte, NC

4/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number340166

Location8800 North Tyron StreetCharlotte, NC 28262 · Mecklenburg County

Emergency services Birthing friendly

Novant Health Huntersville Medical Center

Acute Care Hospitals · Huntersville, NC

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number340183

Location10030 Gilead RoadHuntersville, NC 28078 · Mecklenburg County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 28036 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

$125.01 typical visit price

range $54.12 – $165.09

Typical copayment $31.25 (range $13.53 – $41.27)

Most-billed visit code 99204

Established Patient

$95.94 typical visit price

range $17.21 – $134.61

Typical copayment $23.98 (range $4.30 – $33.65)

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.

91.06/100

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

Scored as part of a group practice

Quality

84.96

Promoting Interoperability

100

Improvement Activities

Cost

85.24

Other Providers at the Same Location NPPES 2

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

SOUTHEAST STONE CENTER

Clinic/Center (Lithotripsy)

705 GRIFFITH ST STE 205
DAVIDSON, NC 28036

Mecklenburg County (866) 828-0173

KNOXVILLE AREA STONE CENTER

Clinic/Center (Lithotripsy)

705 GRIFFITH ST STE 205
DAVIDSON, NC 28036

Mecklenburg County (888) 557-5427

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 Garrett Greenan's NPI number?

The NPI number for Garrett Greenan is 1225579584. It was assigned to this individual provider in the NPPES registry on March 20, 2017.

Where is Garrett Greenan located?

Garrett Greenan practices at 705 Griffith St Ste 205, Davidson, NC 28036. The listed phone number is (704) 372-7974.

What is Garrett Greenan's specialty?

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

Is Garrett Greenan enrolled in Medicare?

Yes. Garrett Greenan 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.

What insurance does Garrett Greenan accept?

Health plans from Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee, Blue Cross and Blue Shield of NC and UnitedHealthcare list Garrett Greenan 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 Garrett Greenan affiliated with any hospitals?

According to CMS data, Garrett Greenan is affiliated with Carolinas Medical Center-Northeast, Novant Health Presbyterian Medical Center, Carolinas Medical Center/Behav Health, Atrium Health University City and Novant Health Huntersville Medical Center.

When was this NPI record last updated?

The NPPES record for Garrett Greenan was last updated on January 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.