DR. GRANT JOHNSON D.O.
NPI 1851778609
Urology in Smyrna, TN

Q: What is Grant Johnson's NPI number?

The NPI number for Grant Johnson is 1851778609. It was assigned to this individual provider in the NPPES registry on April 30, 2015.

Q: What is Grant Johnson's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Q: When was this NPI record last updated?

The NPPES record for Grant Johnson was last updated on February 24, 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 April 30, 2015PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

521 STONECREST PKWY STE 202, SMYRNA, TN 37167(615) 459-3330(615) 459-2997 Get Directions Write a Review

NPPES record last updated: February 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Grant Johnson D.o. NPPES

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

DR. GRANT JOHNSON D.O. (NPI 1851778609) is an individual urology provider in Smyrna, Tennessee, licensed in Tennessee (4082) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Ascension Saint Thomas Hospital, and maintains a secondary practice location in Nashville.

NPPES Registry Identity

NPI1851778609

Entity TypeIndividualMale

Primary Taxonomy208800000X

Provider Legal NameDR. GRANT JOHNSONCredential: D.O.

Location Address521 STONECREST PKWY STE 202Smyrna, TN 37167-6898

Mailing Address2801 Charlotte AveNashville, TN 37209-4035 · (615) 250-9200 · Fax (615) 250-9251

Phone(615) 459-3330

Fax(615) 459-2997

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateApril 30, 2015

Last NPPES UpdateFebruary 24, 2026

NPPES CertifiedFebruary 24, 2026

✔ NPI 1851778609 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians

Taxonomy Code208800000X

License✔ Licensed in TN · 4082

Definition

A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.

521 STONECREST PKWY STE 202, Smyrna, TN 37167

Open in Google Maps ↗

Secondary Practice Location 1

Location 12801 Charlotte AveNashville, TN 37209-4035 · Phone (615) 459-3330

Other Identifiers 1

Other4082TN · State License

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. Grant Johnson D.o. 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 ID2961798582

PECOS Enrollment IDI20200831001479

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 Grant Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Urology Associates PC

19 mi

Urology

2801 CHARLOTTE AVE
Nashville, TN 37209

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

NPI 1043297542 (615) 250-9200

Urology Surgery Center LP

19 mi

Ambulatory Surgical

2801 CHARLOTTE AVE
Nashville, TN 37209

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

NPI 1073598066 (615) 250-9302

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 23

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.

328 services186 patients

Ultrasound measurement of bladder capacity after voiding 51798

Ultrasound measurement of bladder capacity after voiding is a non-invasive test that uses sound waves to create images of your bladder. It's done after you've emptied your bladder to see if there's any leftover urine, which can help diagnose certain conditions.

252 services159 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

218 services146 patients

Manual urinalysis test with examination using microscope, automated 81001

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

139 services91 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.

106 services82 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.

87 services87 patients

Psa (prostate specific antigen) measurement, total 84153

PSA measurement is a simple blood test that checks for a specific protein produced by your body. High levels could indicate a health issue that needs further investigation. It's often used to monitor general wellness and is part of routine health screening.

46 services42 patients

Bacterial colony count, urine 87086

A bacterial colony count, urine, is a laboratory test that checks a urine sample for bacteria. It helps to identify if an infection is present in the urinary system. High numbers of bacteria in the urine can indicate a urinary tract infection (UTI).

42 services37 patients

Diagnostic exam of bladder and urethra using an endoscope 52000

This procedure involves using a thin, flexible tube with a light, called an endoscope, to examine the bladder and urethra. It helps in identifying any abnormalities or issues that may be causing discomfort or other symptoms.

33 services29 patients

Ultrasound scan of pelvic region through rectum 76872

An ultrasound scan of the pelvic region through the rectum is a medical procedure where a small, smooth device is gently inserted into the rectum. This device uses sound waves to create images of the internal structures in the lower abdomen, aiding in diagnosis and treatment planning.

32 services32 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

28 services27 patients

Diagnostic exam of bladder and urethra using an endoscope 52000

23 services23 patients

Complex measurement of pressure of urine flow in bladder with voiding pressure studies 51728

This procedure measures the pressure in your bladder as it fills and empties. It helps to understand how well your bladder is functioning. Sensors record pressure levels during these processes, providing valuable data for your doctor.

21 services20 patients

Electronic assessment of bladder emptying 51741

Electronic assessment of bladder emptying is a non-invasive test that measures how well your bladder functions. It uses ultrasound technology to create images of your bladder before and after you use the restroom, helping to identify any issues with bladder emptying.

21 services19 patients

Crushing of stone of ureter with insertion of stent using an endoscope 52356

This procedure involves using a thin, flexible tube (endoscope) to locate and break down kidney stones in the ureter. After this, a small tube (stent) is inserted to help maintain an open pathway for urine to flow.

20 services19 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.

20 services19 patients

Biopsy of prostate gland 55700

A biopsy of the prostate gland is a procedure where a small sample of tissue is taken from your body's internal gland, located near the bladder, for testing. This helps in diagnosing potential health issues. It's usually done with a fine needle and imaging technology for accuracy.

19 services19 patients

Bacterial culture for aerobic isolates 87077

A bacterial culture for aerobic isolates is a lab test that helps identify bacteria that thrive in oxygen-rich environments. A sample from the suspected infection site is collected, then placed in a special medium that promotes bacterial growth. After a set period, the lab identifies any bacteria present, aiding in accurate diagnosis and treatment.

18 services14 patients

Evaluation of antimicrobial drug (antibiotic, antifungal, antiviral), microdilution or agar dilution 87186

This process checks how well certain drugs, like antibiotics, can fight against infections. It involves mixing the drug with a microbe (like bacteria or a virus) in a lab. By observing how the microbe reacts, it helps determine the best drug to treat your infection.

18 services14 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.

18 services15 patients

Insertion of stent in ureter using an endoscope 52332

This procedure involves placing a small, flexible tube (stent) in your body's drainage system to help urine flow from the kidneys to the bladder. An endoscope, a thin tube with a light and camera, is used for precise placement.

16 services15 patients

Simple removal of foreign body, stone, or stent in urethra or bladder using an endoscope 52310

This is a procedure to remove an object, stone, or tube from your urinary tract. An endoscope, a thin, flexible tube with a light and camera, is used to locate and remove the object. It is a safe and effective way to address the issue.

14 services14 patients

Testosterone (hormone) level, total 84403

A total testosterone level test measures the amount of a key hormone in your body. This hormone influences various body functions such as muscle mass, energy levels, and mood. The test involves a simple blood draw, and results help monitor health conditions.

13 services11 patients

Hospital Affiliations CMS Care Compare 4

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

Ascension Saint Thomas Hospital

Acute Care Hospitals · Nashville, TN

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440082

Location4220 Harding Rd, PO Box 380Nashville, TN 37205 · Davidson County

Emergency services Birthing friendly

Tristar Summit Medical Center

Acute Care Hospitals · Hermitage, TN

2/5 CMS rating

OwnershipProprietary

CMS Certification Number440150

Location5655 Frist BlvdHermitage, TN 37076 · Davidson County

Emergency services Birthing friendly

Tristar Southern Hills Medical Center

Acute Care Hospitals · Nashville, TN

3/5 CMS rating

OwnershipProprietary

CMS Certification Number440197

Location391 Wallace RdNashville, TN 37211 · Davidson County

Emergency services

Tristar Stonecrest Medical Center

Acute Care Hospitals · Smyrna, TN

3/5 CMS rating

OwnershipProprietary

CMS Certification Number440227

Location200 Stonecrest BoulevardSmyrna, TN 37167 · Rutherford County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 37167 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

$66.01 typical visit price

range $16.72 – $131.41

Typical copayment $16.50 (range $4.18 – $32.85)

Most-billed visit code 99213

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 as part of a group practice

Other Providers at the Same Location NPPES

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

EMMA JAYNE PHIPPS

Physician Assistant

521 STONECREST PKWY STE 202
SMYRNA, TN 37167

Rutherford County (615) 459-3330

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 Grant Johnson's NPI number?

The NPI number for Grant Johnson is 1851778609. It was assigned to this individual provider in the NPPES registry on April 30, 2015.

Where is Grant Johnson located?

Grant Johnson practices at 521 Stonecrest Pkwy Ste 202, Smyrna, TN 37167. The listed phone number is (615) 459-3330.

What is Grant Johnson's specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Is Grant Johnson enrolled in Medicare?

Yes. Grant Johnson 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 Grant Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grant Johnson reassigns Medicare benefits to 2 organizations: Urology Associates PC (Nashville, TN) and Urology Surgery Center LP (Nashville, 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 Grant Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Grant Johnson accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 4 other insurers list Grant Johnson 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 Grant Johnson affiliated with any hospitals?

According to CMS data, Grant Johnson is affiliated with Ascension Saint Thomas Hospital, Tristar Summit Medical Center, Tristar Southern Hills Medical Center and Tristar Stonecrest Medical Center.

When was this NPI record last updated?

The NPPES record for Grant Johnson was last updated on February 24, 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.