MR. WILLIAM DALLAS ZELENTY
NPI 1831552173
Orthopaedic Surgery - Orthopaedic Surgery of the Spine in New York, NY

Q: What is William Zelenty's NPI number?

The NPI number for William Zelenty is 1831552173. It was assigned to this individual provider in the NPPES registry on April 4, 2016.

Q: What is William Zelenty's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.

Q: When was this NPI record last updated?

The NPPES record for William Zelenty was last updated on January 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 April 04, 2016PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

535 E 70TH ST DEPT OF, NEW YORK, NY 10021(212) 606-1000 Get Directions Write a Review

NPPES record last updated: January 5, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 5, 2024, Jun 25, 2021, Dec 4, 2020 (3 updates tracked since 2020).

On this page

About Mr. William Dallas Zelenty NPPES

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

MR. WILLIAM DALLAS ZELENTY (NPI 1831552173) is an individual orthopaedic surgery of the spine provider in New York, New York, licensed in New York (308490) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, is affiliated with Morristown Medical Center, and is a graduate of New York University Medical College - Nlg (2016).

NPPES Registry Identity

NPI1831552173

Entity TypeIndividualMale

Primary Taxonomy207XS0117X

Provider Legal NameMR. WILLIAM DALLAS ZELENTY

Location Address535 E 70TH ST DEPT OFNew York, NY 10021-4823

Mailing AddressPo Box 29234New York, NY 10087-9234 · (212) 606-1448 · Fax (646) 714-6387

Phone(212) 606-1000

Sole ProprietorYes

Medical School CMSNew York University Medical College - NlgGraduated 2016

Enumeration DateApril 4, 2016

Last NPPES UpdateJanuary 5, 20243 updates tracked since enumeration

NPPES CertifiedJanuary 5, 2024

✔ NPI 1831552173 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOrthopaedic Surgery · Orthopaedic Surgery of the SpineAllopathic & Osteopathic Physicians

Taxonomy Code207XS0117X

License✔ Licensed in NY · 308490

Definition

Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic surgeons of the spine deal with the evaluation and nonoperative and operative treatment of the full spectrum of primary spinal disorders including trauma, degenerative, deformity, tumor, and reconstructive.

535 E 70TH ST DEPT OF, New York, NY 10021

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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

Mr. William Dallas Zelenty 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 ID4981001666

PECOS Enrollment IDI20220726002725

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 Reassignment

Medicare enrollment records show William Zelenty reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ny Society For The Relief Of Ruptured & Crippled Maintaining

Same address

Orthopaedic Surgery

535 E 70TH ST
New York, NY 10021

Reassigned Medicare billing, New York enrollment
196 clinicians in this Medicare group

NPI 1902243488 (212) 774-7598

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.

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

264 services264 patients

Insertion of cage or mesh device to spine bone and disc space during spine fusion 22853

Spine fusion is a procedure to join two or more vertebrae. During this process, a cage or mesh device is inserted into the spine bone and disc space. This helps to stabilize the spine, reduce pain, and improve functionality. The device acts as a bridge for new bone to grow on.

105 services52 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.

105 services89 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

85 services77 patients

Partial removal of spine bone with release of spinal cord and/or nerves, each additional segment 63048

This procedure involves the partial removal of a bone in your spine to alleviate pressure on your spinal cord or nerves. It may be performed on multiple spine segments depending on your condition. The aim is to improve mobility and reduce pain or discomfort.

62 services40 patients

Partial removal of spine bone with release of lower spinal cord and/or nerves, 1 segment 63047

This procedure involves removing part of a spine bone to alleviate pressure on the lower spinal cord and/or nerves. It targets a single segment of the spine, improving mobility and reducing pain. It's a common treatment for conditions like herniated discs or spinal stenosis.

58 services57 patients

Fusion of additional segment of spine 22614

Fusion of an additional segment of the spine is a surgical procedure to join two or more vertebrae together. This is done to stabilize the spine and reduce pain or correct a deformity. The procedure involves using bone grafts, rods, or screws to secure the spine.

49 services16 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.

46 services42 patients

Fusion of lower spine bone through abdomen with partial removal of disc 22558

This procedure involves merging the bones in your lower spine through an abdominal approach. A portion of the disc, which acts like a cushion between your vertebrae, is partially removed. The goal is to alleviate back pain by limiting movement in the problem area of your spine.

24 services22 patients

Computer-assisted spinal procedure 61783

A computer-assisted spinal procedure is a surgical technique that uses computer technology for improved precision. It involves creating a 3D image of your spine to guide the surgeon during the operation. This method enhances accuracy, reduces risk, and promotes quicker recovery.

24 services24 patients

Fusion of spine in lower back with partial removal of spine bone and disc 22633

This procedure, called lumbar spinal fusion, involves joining two or more vertebrae in your lower back. It includes a partial removal of a spine bone and disc to alleviate pain and improve stability. The goal is to reduce motion between vertebrae and prevent nerve irritation.

21 services21 patients

Placement of stabilizing device to back, 3-6 spine bone segments 22842

This procedure involves placing a device on your back to stabilize 3-6 spine bone segments. It aids in maintaining spine alignment and reducing pain. The device is secured to the bones, providing support and promoting healing.

18 services18 patients

Partial removal of bone of single segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back 63052

This procedure involves the partial removal of a bone segment in your lower back to relieve pressure on your spinal cord or nerves. It's usually done during a spinal fusion in the lower back, which helps to stabilize your spine by joining two or more vertebrae together.

17 services17 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

17 services17 patients

Placement of stabilizing device to back of 1 spine bone in neck 22840

This procedure involves positioning a stabilizing device onto a single spinal bone in the neck. The goal is to provide support and prevent movement that could cause discomfort or further injury. It's performed by trained specialists under anesthesia.

16 services16 patients

Partial removal of bone of additional segment of spine in lower back with release of spinal cord and/or nerves during fusion of spine in lower back 63053

This procedure involves partially removing a bone section in the lower back to relieve pressure on the spinal cord or nerves. It's performed during a spinal fusion, where bones in the lower back are joined to improve stability and reduce pain.

16 services11 patients

Telephone medical discussion with physician, 5-10 minutes 99441

A telephone medical discussion with a physician is a brief, 5-10 minute call where you can discuss your health concerns. It's a convenient way to receive medical advice without needing to visit a clinic. It's important to prepare questions in advance to make the most of this time.

16 services15 patients

Fusion of spine bones through front of body with partial removal of disc, each additional disc 22585

This procedure involves merging spine bones via the front of the body. A portion of each additional disc is removed to ease pressure and discomfort. This helps to stabilize the spine and improve mobility.

15 services12 patients

Fusion of upper spine bone with removal of disc and release of spinal cord or nerve, 1 disc 22551

This procedure involves fusing together the bones in the upper spine to stabilize it. A disc is removed to ease pressure on the spinal cord or nerve. This helps reduce pain and improve mobility. This is a common treatment for certain spinal conditions.

14 services14 patients

Partial removal of spine bone with release of lower spinal cord or nerves and/or removal of disc 63030

This procedure involves partially removing a spine bone, which may help to alleviate pressure on the lower spinal cord or nerves. It can also include disc removal. This can reduce pain and improve mobility. It's a common treatment for certain back conditions.

11 services11 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.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Morristown Medical Center

Acute Care Hospitals · Morristown, NJ

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310015

Location100 Madison AveMorristown, NJ 07960 · Morris County

Emergency services Birthing friendly

Hospital For Special Surgery

Acute Care Hospitals · New York, NY

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330270

Location535 East 70th StreetNew York, NY 10021 · New York County

Emergency services

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 3

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

DR. CHRISTIAN ROBERT TILLEY MD

Anesthesiology

535 E 70TH ST DEPT OF
NEW YORK, NY 10021

New York County (212) 774-2468

DR. MICHELLE CHRISTINE CARLEY M.D.

Anesthesiology (Pediatric Anesthesiology)

535 E 70TH ST DEPT OF
NEW YORK, NY 10021

New York County (212) 606-1036

DR. WILLIAM AMBLER M,D.

Student in an Organized Health Care Education/Training Program

535 E 70TH ST DEPT OF
NEW YORK, NY 10021

New York County (212) 774-2302

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 William Zelenty's NPI number?

The NPI number for William Zelenty is 1831552173. It was assigned to this individual provider in the NPPES registry on April 4, 2016.

Where is William Zelenty located?

William Zelenty practices at 535 E 70th St Dept Of, New York, NY 10021. The listed phone number is (212) 606-1000.

What is William Zelenty's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Orthopaedic Surgery of the Spine, with taxonomy code 207XS0117X.

Is William Zelenty enrolled in Medicare?

Yes. William Zelenty 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 organization bills Medicare for William Zelenty's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Zelenty reassigns Medicare benefits to Ny Society For The Relief Of Ruptured & Crippled Maintaining (New York, NY). The 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 William Zelenty's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is William Zelenty affiliated with any hospitals?

According to CMS data, William Zelenty is affiliated with Morristown Medical Center and Hospital For Special Surgery.

When was this NPI record last updated?

The NPPES record for William Zelenty was last updated on January 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.