Dr. Mark E Gilder , MD
Colon & Rectal Surgery • Millburn, NJ
231 Millburn Ave
Millburn, NJ 070411718
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Dr. Mark Gilder is listed in NPPES under Colon & Rectal Surgery.
-
NPI assigned on February 21, 2006; this date does not establish years in practice.
-
Published CMS data list 520 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
-
Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 90 service units.
- 46221 — Removal of external hemorrhoids by rubber banding: 73 service units.
- 46600 — Diagnostic exam of anus using an endoscope: 65 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 13 records in the table · Guide: How to read Medicare Part B data
-
Published CMS data list 67 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Metronidazole — 17 prescription fills, including refills.
- Neomycin Sulfate — 15 prescription fills, including refills.
- Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) — 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table · Guide: How to read Medicare Part D prescriber data
-
More Medicare Part B services than 65% of clinicians listed under Colon & Rectal Surgery in New Jersey (2024, 63 clinicians with data). Median for this group: 396. Middle half: 201 to 585.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 397 in 2020 to 520 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
231 Millburn Ave
Millburn, NJ 070411718
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Barnabas Health Medical Group, Pc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
New York Medical College
1987
What Public CMS Data Show
Colon & Rectal Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
245 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $95,086 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $77,245 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
67 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$4,881 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $599.01 across 17 records.
By nature of payment
- Food and Beverage: $599.01 across 17 records.
Reporting-company totals (3 largest of 11)
- Kerecis Limited: $164.30 across 3 records.
- INTUITIVE SURGICAL, INC.: $157.01 across 2 records.
- Salix Pharmaceuticals, a division of Bausch Health US, LLC: $55.51 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
39 years (graduated 1987)
CMS Doctors and Clinicians data list 1987 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Gilder has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Gilder as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Millburn and New Jersey
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Colon & Rectal Surgery in New Jersey (2024, 63 clinicians with data). Median for this group: 396. Middle half: 201 to 585.
Too few clinicians listed under Colon & Rectal Surgery in Millburn have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 75% of clinicians listed under Colon & Rectal Surgery in New Jersey (2024, 63 clinicians with data). Median for this group: $52,901. Middle half: $26,502 to $88,737.
Too few clinicians listed under Colon & Rectal Surgery in Millburn have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Colon & Rectal Surgery in New Jersey (2024, 63 clinicians with data). Median for this group: $40,865. Middle half: $19,777 to $67,566.
Too few clinicians listed under Colon & Rectal Surgery in Millburn have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Colon & Rectal Surgery in New Jersey (2024, 63 clinicians with data). Median for this group: 73. Middle half: 36 to 144.
Too few clinicians listed under Colon & Rectal Surgery in Millburn have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 70% of clinicians listed under Colon & Rectal Surgery in New Jersey (2024, 63 clinicians with data). Median for this group: $536. Middle half: $191 to $5,050.
Too few clinicians listed under Colon & Rectal Surgery in Millburn have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under Colon & Rectal Surgery with a practice address in Millburn, NJ (95 in New Jersey).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part B services
Medicare Part B services increased 31% from 397 in 2020 to 520 in 2024.
- 2020: 397
- 2021: 517
- 2022: 536
- 2023: 414
- 2024: 520
-
Medicare-allowed amount
Medicare-allowed amount increased 44% from $65,857 in 2020 to $95,086 in 2024.
- 2020: $65,857
- 2021: $93,167
- 2022: $100,355
- 2023: $72,172
- 2024: $95,086
-
Paid by Medicare
Paid by Medicare increased 52% from $50,678 in 2020 to $77,245 in 2024.
- 2020: $50,678
- 2021: $72,274
- 2022: $77,995
- 2023: $55,254
- 2024: $77,245
-
Medicare Part D prescriptions
Medicare Part D prescriptions decreased 21% from 85 in 2020 to 67 in 2024.
- 2020: 85
- 2021: 76
- 2022: 80
- 2023: 128
- 2024: 67
-
30-day fills
30-day fills decreased 21% from 85 in 2020 to 67 in 2024.
- 2020: 85
- 2021: 76
- 2022: 80
- 2023: 128
- 2024: 67
-
Part D drug cost
Part D drug cost varied from year to year: $4,868 in 2020 and $4,881 in 2024.
- 2020: $4,868
- 2021: $12,070
- 2022: $8,186
- 2023: $8,276
- 2024: $4,881
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $333.14 in 2021 to $599.01 in 2025.
- 2021: $333.14
- 2022: $1,317.61
- 2023: $446.08
- 2024: $1,788.92
- 2025: $599.01
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 17 records totaling $599.01.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| INTUITIVE SURGICAL, INC. |
Food and Beverage
In-kind items and services
|
Da Vinci Surgical System | General | $123.60 |
| Kerecis Limited |
Food and Beverage
Cash or cash equivalent
|
Kerecis SurgiClose | General | $55.73 |
| Kerecis Limited |
Food and Beverage
Cash or cash equivalent
|
Kerecis SurgiClose | General | $54.96 |
| Kerecis Limited |
Food and Beverage
Cash or cash equivalent
|
Kerecis SurgiClose | General | $53.61 |
| Acera Surgical, Inc. |
Food and Beverage
In-kind items and services
|
Restrata Wound Matrix | General | $46.92 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
ABSORBATACK | General | $33.70 |
| INTUITIVE SURGICAL, INC. |
Food and Beverage
In-kind items and services
|
Da Vinci Surgical System | General | $33.41 |
| Myriad Genetic Laboratories, Inc. |
Food and Beverage
In-kind items and services
|
MYRISK | General | $25.31 |
| MIMEDX Group, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $23.91 |
| MIMEDX Group, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $22.74 |
| Sebela Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
|
SUFLAVE | General | $19.67 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
|
XIFAXAN | General | $19.00 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
VELSIPITY | General | $18.76 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
|
XIFAXAN | General | $18.61 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
|
XIFAXAN | General | $17.90 |
| Takeda Pharmaceuticals U.S.A., Inc. |
Food and Beverage
In-kind items and services
|
EOHILIA | General | $16.44 |
| VERTEX PHARMACEUTICALS INCORPORATED |
Food and Beverage
In-kind items and services
|
JOURNAVX | General | $14.74 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
90 | 72 | $562.00 | $143.33 |
|
46221
Removal of external hemorrhoids by rubber banding
|
73 | 55 | $1270.00 | $323.90 |
|
46600
Diagnostic exam of anus using an endoscope
|
65 | 58 | $534.00 | $135.23 |
|
99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
58 | 58 | $730.00 | $186.16 |
|
99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
44 | 44 | $489.00 | $124.67 |
|
99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
|
35 | 20 | $335.00 | $85.18 |
|
99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
|
31 | 24 | $789.00 | $201.50 |
|
45385
Removal of polyps or growths of large bowel using an endoscope with mechanical snare
|
29 | 29 | $2013.00 | $274.49 |
|
G0105
Colorectal cancer screening; colonoscopy on individual at high risk
|
22 | 22 | $1511.00 | $200.03 |
|
99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
|
21 | 20 | $555.00 | $140.80 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
19 | 17 | $399.00 | $101.35 |
|
99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
|
19 | 18 | $735.00 | $187.83 |
|
99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
|
14 | 14 | $961.00 | $244.93 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Metronidazole | Metronidazole | 17 | 37 | $20.39 | 16 |
| Neomycin Sulfate | Neomycin Sulfate | 15 | 19 | $40.34 | 15 |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 13 | 16 | $741.90 | 13 |
| Oxycodone Hcl | Oxycodone Hcl | 11 | 44 | $32.25 | 11 |
| Opium Tincture | Opium Tincture | 11 | 310 | $4,046.51 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2024-02-14NUCC Taxonomy Code: 208C00000X
A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - COLORECTAL SURGERY (PROCTOLOGY)
I20050627000767
NJ
6002851326
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Barnabas Health Medical Group, Pc
201 Lyons Ave, Newark, NJ 071122027
Phone: 9739267814
Barnabas Health Medical Group, Pc
201 Lyons Ave, Newark, NJ 071122027
Phone: 7329237455
Barnabas Health Medical Group, Pc
200 S Orange Ave, Livingston, NJ 070395817
Barnabas Health Medical Group, Pc
94 Old Short Hills Rd, Livingston, NJ 070395672
Phone: 8887247123
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Colon & Rectal Surgery (license number reported to NPPES: NJ 25MA05933500)
NPI status registered as active in NPPES database
Registered at 231 MILLBURN AVE, MILLBURN, NJ 070411718 (Tel: 9734672277)
Registered at 231 MILLBURN AVE, MILLBURN, NJ 070411718 (Tel: 9734672277)
Recorded as MARK GILDER, M.D.
Specialist (license number reported to NPPES: NJ 25MA05933500)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
231 Millburn Ave
Millburn, NJ 070411718
Phone: 9734672277