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

DR. PHOTIOS MICHAEL FRANK VASSILYADI MD
NPI 1821519257
Internal Medicine in Mt Juliet, TN

Q: What is Photios Michael Frank Vassilyadi's NPI number?

The NPI number for Photios Michael Frank Vassilyadi is 1821519257. It was assigned to this individual provider in the NPPES registry on July 6, 2017.

Q: What is Photios Michael Frank Vassilyadi's specialty?

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

Active since July 06, 2017PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

3500 N MOUNT JULIET RD STE 201, MT JULIET, TN 37122(615) 758-5672(615) 758-5609 Get Directions Write a Review

NPPES record last updated: August 31, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 31, 2026, Aug 27, 2026, Aug 4, 2026 and 5 more (8 updates tracked since 2017).

On this page

About Dr. Photios Michael Frank Vassilyadi Md NPPES

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

DR. PHOTIOS MICHAEL FRANK VASSILYADI MD (NPI 1821519257) is an individual internal medicine provider in Mt Juliet, Tennessee, licensed in Tennessee (60958) and active in the NPI registry since July 2017. He is enrolled in Medicare PECOS, is affiliated with Vanderbilt University Medical Center, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1821519257

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. PHOTIOS MICHAEL FRANK VASSILYADICredential: MD

Location Address3500 N MOUNT JULIET RD STE 201Mt Juliet, TN 37122-3018

Mailing Address5050 Carothers Pkwy Ste 104Franklin, TN 37067-6024 · (615) 669-5073

Phone(615) 758-5672

Fax(615) 758-5609

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateJuly 6, 2017

Last NPPES UpdateAugust 31, 20268 updates tracked since enumeration

NPPES CertifiedAugust 31, 2026

✔ NPI 1821519257 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in TN · 60958

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.

3500 N MOUNT JULIET RD STE 201, Mt Juliet, TN 37122

Open in Google Maps ↗

Secondary Practice Locations 3

Location 11 Medical Center BlvdCookeville, TN 38501-4294 · Phone (931) 528-2541

Location 25050 Carothers Pkwy Ste 104Franklin, TN 37067-6024 · Phone (615) 669-5073 · Fax (619) 367-0242

Location 3315 Deaderick St Ste 1550Nashville, TN 37238-3003 · Phone (888) 803-3370

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter Health, Ambetter of Alabama and more.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

Dr. Photios Michael Frank Vassilyadi 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 ID5496025488

PECOS Enrollment IDI20200806000649

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 Photios Michael Frank Vassilyadi reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Crossroads Medical Group, PLLC

19 mi

Clinic/Center

491 SAGE RD., SUITE 200
White House, TN 37188

Reassigned Medicare billing, Tennessee enrollment
76 clinicians in this Medicare group

NPI 1073539607 (615) 672-7122

Williamson Hospitalist Program

27 mi

Hospitalist

4323 CAROTHERS PKWY STE 205
Franklin, TN 37067

Reassigned Medicare billing, Tennessee enrollment
54 clinicians in this Medicare group

NPI 1871057158 (615) 435-6700

Amg-Hillside LLC

61 mi

Rural Health

2291 CORNERSVILLE HWY
Lewisburg, TN 37091

Reassigned Medicare billing, Tennessee enrollment
53 clinicians in this Medicare group

NPI 1881426740 (931) 288-8031

Amg-Crockett LLC

69 mi

Rural Health

4995 HIGHWAY 43 N, STE D
Mt Pleasant, TN 38474

Reassigned Medicare billing, Tennessee enrollment
91 clinicians in this Medicare group

NPI 1255069639 (931) 964-0849

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 21

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.

396 services124 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.

332 services136 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

175 services94 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.

152 services141 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.

142 services122 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.

122 services115 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.

106 services97 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

83 services33 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

78 services78 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

67 services57 patients

Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a G0179

This procedure involves a doctor or approved practitioner reviewing your health status and re-certifying your need for Medicare-covered home health services. It includes communication with the home health agency and assessment of your health reports, even when you're not physically present.

57 services26 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

43 services43 patients

Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg J3420

This is a procedure where a small dose of Vitamin B-12, also known as Cyanocobalamin, is injected into your body. This vitamin is essential for nerve function and the production of red blood cells. It's often used to treat vitamin B-12 deficiency.

40 services20 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

37 services37 patients

Test to determine lung volumes using sensors 94726

This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.

33 services33 patients

Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days 93244

A heart rhythm review involves monitoring your heart's electrical activity for more than 48 hours up to 7 days. Using a device called an external EKG, doctors can track your heartbeats to detect irregularities and help diagnose heart conditions.

22 services22 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.

21 services21 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

17 services15 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza 87428

This test uses a method called immunoassay to identify severe acute respiratory syndrome coronavirus and influenza. It works by detecting specific proteins (antigens) in a sample, like a nasal swab. It's a powerful tool in diagnosing these viral infections.

14 services14 patients

Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) 87880

A detection test by immunoassay for Group A Strep is a quick procedure to identify a bacterial infection in your throat. It involves taking a throat swab and applying it to a test strip, which changes color if Strep bacteria are present.

12 services12 patients

Nursing facility discharge management, more than 30 minutes 99316

Nursing facility discharge management over 30 minutes is a comprehensive process where a healthcare team prepares you for leaving the facility. It involves creating a tailored plan, coordinating care, and ensuring a smooth transition to your next care setting.

11 services11 patients

Hospital Affiliations CMS Care Compare 4

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

Vanderbilt University Medical Center

Acute Care Hospitals · Nashville, TN

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440039

Location1211 Medical Center DriveNashville, TN 37232 · Davidson County

Emergency services Birthing friendly

Cookeville Regional Medical Center

Acute Care Hospitals · Cookeville, TN

1/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number440059

Location1 Medical Center BoulevardCookeville, TN 38501 · Putnam County

Emergency services Birthing friendly

Maury Regional Hospital

Acute Care Hospitals · Columbia, TN

3/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number440073

Location1224 Trotwood AveColumbia, TN 38401 · Maury County

Emergency services Birthing friendly

Southern Tennessee Regional Health System Lawrence

Acute Care Hospitals · Lawrenceburg, TN

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number440175

Location1607 South Locust AvenueLawrenceburg, TN 38464 · Lawrence County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37122 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

$121.80 typical visit price

range $52.64 – $160.89

Typical copayment $30.45 (range $13.16 – $40.22)

Most-billed visit code 99204

Established Patient

$93.60 typical visit price

range $16.72 – $131.41

Typical copayment $23.40 (range $4.18 – $32.85)

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.

75/100

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

Scored through an Alternative Payment Model

Referred Medical Equipment & Supplies CMS DME claims 8

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

10 suppliers36 claims126 services$6.86 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

8 suppliers17 claims34 services$1.21 avg. paid by Medicare

Filter, disposable, used with positive airway pressure device A7038

DME-Other DME · category DE001N

6 suppliers13 claims62 services$3.09 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

4 suppliers63 claims65 services$19.15 avg. paid by Medicare

Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466

DME-Other DME · category DE005N

2 suppliers15 claims15 services$911.35 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

5 suppliers112 claims114 services$108.43 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 6

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

KELSEY BUCK FNP-C

Nurse Practitioner (Family)

3500 N MOUNT JULIET RD STE 201
MT JULIET, TN 37122

Wilson County (615) 758-5672

MRS. KYLIE DANIELLE BLACKETT NP

Nurse Practitioner (Family)

3500 N MOUNT JULIET RD STE 201
MOUNT JULIET, TN 37122

Wilson County (615) 758-5672

CHELSEY HUFF

Nurse Practitioner (Family)

3500 N MOUNT JULIET RD STE 201
MT JULIET, TN 37122

Wilson County (615) 758-5672

BROOKE MORRIS FNP-C

Nurse Practitioner

3500 N MOUNT JULIET RD STE 201
MOUNT JULIET, TN 37122

Wilson County (615) 758-5672

MICHELLE SONNICHSEN-KUMM

Nurse Practitioner (Family)

3500 N MOUNT JULIET RD STE 201
MT JULIET, TN 37122

Wilson County (615) 758-5672

MRS. TIFFANY NICOLE GUERRIERI NP-C

Nurse Practitioner

3500 N MOUNT JULIET RD STE 201
MT JULIET, TN 37122

Wilson County (615) 758-5672

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 Photios Michael Frank Vassilyadi's NPI number?

The NPI number for Photios Michael Frank Vassilyadi is 1821519257. It was assigned to this individual provider in the NPPES registry on July 6, 2017.

Where is Photios Michael Frank Vassilyadi located?

Photios Michael Frank Vassilyadi practices at 3500 N Mount Juliet Rd Ste 201, Mt Juliet, TN 37122. The listed phone number is (615) 758-5672.

What is Photios Michael Frank Vassilyadi's specialty?

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

Is Photios Michael Frank Vassilyadi enrolled in Medicare?

Yes. Photios Michael Frank Vassilyadi 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 Photios Michael Frank Vassilyadi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Photios Michael Frank Vassilyadi reassigns Medicare benefits to 4 organizations: Crossroads Medical Group, PLLC (White House, TN), Williamson Hospitalist Program (Franklin, TN), Amg-Hillside LLC (Lewisburg, TN) and Amg-Crockett LLC (Mt Pleasant, TN). 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 Photios Michael Frank Vassilyadi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Photios Michael Frank Vassilyadi accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 3 other insurers list Photios Michael Frank Vassilyadi 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 Photios Michael Frank Vassilyadi affiliated with any hospitals?

According to CMS data, Photios Michael Frank Vassilyadi is affiliated with Vanderbilt University Medical Center, Cookeville Regional Medical Center, Maury Regional Hospital and Southern Tennessee Regional Health System Lawrence.

When was this NPI record last updated?

The NPPES record for Photios Michael Frank Vassilyadi was last updated on August 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 55 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.